Cita APA (7a ed.)

Howard, J. (2001). Darwin: A Very Short Introduction (1st.). Oxford.

Cita Chicago Style (17a ed.)

Howard, Jonathan. Darwin: A Very Short Introduction. 1st. Oxford, 2001.

Cita MLA (9a ed.)

Howard, Jonathan. Darwin: A Very Short Introduction. 1st. Oxford, 2001.

Precaución: Estas citas no son 100% exactas.