APA (7th ed.) Citation

Cameron, D., Elliot, J., Loy, M., Raymond, E., & Rosenblatt, B. (2004). Learning GNU Emacs: A guide to the world's most extensible, customizable editor (3rd ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Cameron, Debra, James Elliot, Marc Loy, Eric Raymond, and Bill Rosenblatt. Learning GNU Emacs: A Guide to the World's Most Extensible, Customizable Editor. 3rd ed. Sebastopol, California: O'Reilly, 2004.

MLA (9th ed.) Citation

Cameron, Debra, et al. Learning GNU Emacs: A Guide to the World's Most Extensible, Customizable Editor. 3rd ed. O'Reilly, 2004.