Citazione Stile APA (7a Edizione)

Darwin, C., & Burrow, J. W. (1968). The origin of species. Penguin Books.

Citazione stile Chigago Style (17a edizione)

Darwin, Charles, e J. W. Burrow. The Origin of Species. Harmondsworth, Middlesex: Penguin Books, 1968.

Citatione MLA (9a ed.)

Darwin, Charles, e J. W. Burrow. The Origin of Species. Penguin Books, 1968.