Cita APA (7th ed.)

Darwin, C. (1998). The origin of species. Wadsworth.

Cita Chicago (17th ed.)

Darwin, Charles. The Origin of Species. Hertfordshire: Wadsworth, 1998.

Cita MLA (8th ed.)

Darwin, Charles. The Origin of Species. Wadsworth, 1998.

Atenció: Aquestes cites poden no estar 100% correctes.