Cita APA

Darwin, C. (1993). The portable Darwin. New York: Penguin Books.

Chicago Style Citation

Darwin, Charles. The Portable Darwin. New York: Penguin Books, 1993.

Cita MLA

Darwin, Charles. The Portable Darwin. New York: Penguin Books, 1993.

Atenció: Aquestes cites poden no estar 100% correctes.