Purdue Owl Chicago Style Guide

The Purdue Owl Chicago Style Guide is a comprehensive resource for writers, researchers, and students who need to format their papers, theses, and dissertations according to the Chicago Manual of Style (CMS). The Chicago style is widely used in academic and professional writing, particularly in the fields of history, philosophy, and social sciences. In this article, we will delve into the details of the Purdue Owl Chicago Style Guide, exploring its features, benefits, and applications.
Introduction to the Chicago Manual of Style

The Chicago Manual of Style is a style guide that provides guidelines for formatting, citation, and referencing in academic and professional writing. The manual is published by the University of Chicago Press and is currently in its 17th edition. The CMS is divided into two main systems: the author-date system and the notes-bibliography system. The author-date system is used in sciences and social sciences, while the notes-bibliography system is used in humanities.
Author-Date System
The author-date system is used to cite sources in the text using the author’s last name and the year of publication. This system is commonly used in sciences and social sciences. For example, a citation for a book would be formatted as follows: (Smith 2020). The corresponding reference list entry would include the author’s name, title of the book, publication date, and publisher.
Element | Format |
---|---|
Author's Name | Last name, First name |
Title of Book | Title of Book: Subtitle |
Publication Date | Year of publication |
Publisher | Publisher's name |

Notes-Bibliography System
The notes-bibliography system is used to cite sources in the text using footnotes or endnotes. This system is commonly used in humanities. For example, a citation for a book would be formatted as follows: 1. The corresponding footnote or endnote would include the author’s name, title of the book, publication date, and publisher.
Features of the Purdue Owl Chicago Style Guide

The Purdue Owl Chicago Style Guide is a web-based resource that provides detailed instructions on how to format papers, theses, and dissertations according to the Chicago Manual of Style. The guide includes features such as:
- Sample papers and theses formatted according to the CMS
- Guidelines for formatting citations and references
- Instructions on how to use footnotes and endnotes
- Examples of how to format tables, figures, and appendices
Benefits of Using the Purdue Owl Chicago Style Guide
Using the Purdue Owl Chicago Style Guide has several benefits, including:
- Improved accuracy: The guide provides detailed instructions on how to format citations and references, reducing the risk of errors.
- Increased efficiency: The guide saves time and effort by providing examples and templates for formatting papers and theses.
- Enhanced credibility: Using the CMS consistently and correctly enhances the credibility of the writer and the institution.
Applications of the Purdue Owl Chicago Style Guide
The Purdue Owl Chicago Style Guide has a wide range of applications, including:
In academic writing, the guide is used to format papers, theses, and dissertations in various fields, including history, philosophy, and social sciences. In professional writing, the guide is used to format reports, articles, and books. In research, the guide is used to format citations and references, ensuring accuracy and consistency.
Real-World Examples
The Purdue Owl Chicago Style Guide is used in various real-world contexts, including:
Academic institutions, such as universities and colleges, use the guide to format papers and theses. Research institutions, such as libraries and archives, use the guide to format citations and references. Professional organizations, such as publishing companies and research centers, use the guide to format reports and articles.
What is the Chicago Manual of Style?
+The Chicago Manual of Style is a style guide that provides guidelines for formatting, citation, and referencing in academic and professional writing.
What is the Purdue Owl Chicago Style Guide?
+The Purdue Owl Chicago Style Guide is a web-based resource that provides detailed instructions on how to format papers, theses, and dissertations according to the Chicago Manual of Style.
What are the benefits of using the Purdue Owl Chicago Style Guide?
+The benefits of using the Purdue Owl Chicago Style Guide include improved accuracy, increased efficiency, and enhanced credibility.