APA (7th ed.) Citation

Punnett, R. C. (2013). Mimicry in Butterflies. Project Gutenberg.

Chicago Style (17th ed.) Citation

Punnett, Reginald Crundall. Mimicry in Butterflies. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Punnett, Reginald Crundall. Mimicry in Butterflies. Project Gutenberg, 2013.

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