APA (7th ed.) Citation

Wallace, A. R. (2005). Darwinism (1889) An exposition of the theory of natural selection, with some of its applications. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wallace, Alfred Russel. Darwinism (1889) An Exposition of the Theory of Natural Selection, with Some of Its Applications. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Wallace, Alfred Russel. Darwinism (1889) An Exposition of the Theory of Natural Selection, with Some of Its Applications. Project Gutenberg, 2005.

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