APA (7th ed.) Citation

Bangs, J. K., & Cooper, F. G. (2007). The Autobiography of Methuselah. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bangs, John Kendrick, and F. G. Cooper. The Autobiography of Methuselah. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Bangs, John Kendrick, and F. G. Cooper. The Autobiography of Methuselah. Project Gutenberg, 2007.

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