APA (7th ed.) Citation

McDougall, W. (2012). The Group Mind A Sketch of the Principles of Collective Psychology. Project Gutenberg.

Chicago Style (17th ed.) Citation

McDougall, William. The Group Mind A Sketch of the Principles of Collective Psychology. Project Gutenberg, 2012.

MLA (9th ed.) Citation

McDougall, William. The Group Mind A Sketch of the Principles of Collective Psychology. Project Gutenberg, 2012.

Warning: These citations may not always be 100% accurate.