APA (7th ed.) Citation

Burroughs, E. R. (2005). Pellucidar. Project Gutenberg.

Chicago Style (17th ed.) Citation

Burroughs, Edgar Rice. Pellucidar. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Burroughs, Edgar Rice. Pellucidar. Project Gutenberg, 2005.

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