APA (7th ed.) Citation

Bierce, A. (2004). Black Beetles in Amber. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bierce, Ambrose. Black Beetles in Amber. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Bierce, Ambrose. Black Beetles in Amber. Project Gutenberg, 2004.

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