Cita APA (7th ed.)
National Geographic Society. (2006). Aves 4 (1a. ed.). RBA Coleccionables ; Weldon Owen Pty Ltd.
Cita Chicago (17th ed.)
National Geographic Society. Aves 4. 1a. ed. RBA Coleccionables ; Weldon Owen Pty Ltd, 2006.
Cita MLA (9th ed.)
National Geographic Society. Aves 4. 1a. ed. RBA Coleccionables ; Weldon Owen Pty Ltd, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.