APA (7th ed.) Citation

Waltermire, A. B. (2010). The Doors of Death. Project Gutenberg.

Chicago Style (17th ed.) Citation

Waltermire, Arthur B. The Doors of Death. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Waltermire, Arthur B. The Doors of Death. Project Gutenberg, 2010.

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