APA (7th ed.) Citation

Roe, E. P. (2004). The Earth Trembled. Project Gutenberg.

Chicago Style (17th ed.) Citation

Roe, Edward Payson. The Earth Trembled. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Roe, Edward Payson. The Earth Trembled. Project Gutenberg, 2004.

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