APA (7th ed.) Citation

Grose, H. B. (2006). Aliens or Americans? Project Gutenberg.

Chicago Style (17th ed.) Citation

Grose, Howard B. Aliens or Americans? Project Gutenberg, 2006.

MLA (9th ed.) Citation

Grose, Howard B. Aliens or Americans? Project Gutenberg, 2006.

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