APA (7th ed.) Citation

Burroughs, E. R. (1996). Out of Time's Abyss. Project Gutenberg.

Chicago Style (17th ed.) Citation

Burroughs, Edgar Rice. Out of Time's Abyss. Project Gutenberg, 1996.

MLA (9th ed.) Citation

Burroughs, Edgar Rice. Out of Time's Abyss. Project Gutenberg, 1996.

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