APA (7th ed.) Citation

O'Reilly, J. B., Wheelwright, J. T., Grant, R., & Stimson, F. J. (2006). The King's Men: A Tale of To-morrow. Project Gutenberg.

Chicago Style (17th ed.) Citation

O'Reilly, John Boyle, John T. Wheelwright, Robert Grant, and Frederic Jesup Stimson. The King's Men: A Tale of To-morrow. Project Gutenberg, 2006.

MLA (9th ed.) Citation

O'Reilly, John Boyle, et al. The King's Men: A Tale of To-morrow. Project Gutenberg, 2006.

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