APA (7th ed.) Citation

Schmid, R., & Zimmermann, G. A. (2007). The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality. Project Gutenberg.

Chicago Style (17th ed.) Citation

Schmid, Rudolf, and G. A. Zimmermann. The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Schmid, Rudolf, and G. A. Zimmermann. The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality. Project Gutenberg, 2007.

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