APA (7th ed.) Citation

Clark, B. M. (2005). General Science. Project Gutenberg.

Chicago Style (17th ed.) Citation

Clark, Bertha May. General Science. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Clark, Bertha May. General Science. Project Gutenberg, 2005.

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