Cita APA (7th ed.)

Doherty, G. (2001). Aves (1a. ed.). Usborne.

Cita Chicago (17th ed.)

Doherty, Gillian. Aves. 1a. ed. Londres: Usborne, 2001.

Cita MLA (9th ed.)

Doherty, Gillian. Aves. 1a. ed. Usborne, 2001.