APA (7th ed.) Citation

Geikie, J. (2011). Geology. Project Gutenberg.

Chicago Style (17th ed.) Citation

Geikie, James. Geology. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Geikie, James. Geology. Project Gutenberg, 2011.

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