APA (7th ed.) Citation

Hubert, P. G. (2012). Inventors. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hubert, Philip Gengembre. Inventors. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Hubert, Philip Gengembre. Inventors. Project Gutenberg, 2012.

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