Cita APA (7th ed.)
National Geographic Society. (2006). Aves 3 (1̊ ed.). RBA Coleccionables ; Weldon Owen Pty Ltd.
Cita Chicago (17th ed.)
National Geographic Society. Aves 3. 1̊ ed. RBA Coleccionables ; Weldon Owen Pty Ltd, 2006.
Cita MLA (9th ed.)
National Geographic Society. Aves 3. 1̊ ed. RBA Coleccionables ; Weldon Owen Pty Ltd, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.