Cita APA (7a ed.)

Romanes, G. J., & Darwin, C. (1885). Mental evolution in animals. Kegan Paul, Trench.

Cita Chicago Style (17a ed.)

Romanes, George John, y Charles Darwin. Mental Evolution in Animals. London: Kegan Paul, Trench, 1885.

Cita MLA (8a ed.)

Romanes, George John, y Charles Darwin. Mental Evolution in Animals. Kegan Paul, Trench, 1885.