Cita APA (7th ed.)

Eisermann, K., & Omland, K. (2007). Coloration anomaly of a male collared trogon (Trogon collris). Instituto de Ecología, A.C.

Cita Chicago (17th ed.)

Eisermann, Knut, i Kevin Omland. Coloration Anomaly of a Male Collared Trogon (Trogon Collris). Instituto de Ecología, A.C, 2007.

Cita MLA (9th ed.)

Eisermann, Knut, i Kevin Omland. Coloration Anomaly of a Male Collared Trogon (Trogon Collris). Instituto de Ecología, A.C, 2007.