APA (7th ed.) Citation

Romanes, G. J., & Darwin, C. (1884). Mental evolution in animals: With a posthumous essay on instinct. D. Appleton.

Chicago Style (17th ed.) Citation

Romanes, George John, and Charles Darwin. Mental Evolution in Animals: With a Posthumous Essay on Instinct. New York: D. Appleton, 1884.

MLA (9th ed.) Citation

Romanes, George John, and Charles Darwin. Mental Evolution in Animals: With a Posthumous Essay on Instinct. D. Appleton, 1884.