APA (7th ed.) Citation

Harvey, E. N. (2010). The Nature of Animal Light. Project Gutenberg.

Chicago Style (17th ed.) Citation

Harvey, E. Newton. The Nature of Animal Light. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Harvey, E. Newton. The Nature of Animal Light. Project Gutenberg, 2010.

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