Eisermann, K., & Omland, K. (2007). Coloration anomaly of a male collared trogon (Trogon collris). Instituto de Ecología, A.C.
Citace podle Chicago (17th ed.)Eisermann, Knut, a Kevin Omland. Coloration Anomaly of a Male Collared Trogon (Trogon Collris). Instituto de Ecología, A.C, 2007.
Citace podle MLA (9th ed.)Eisermann, Knut, a Kevin Omland. Coloration Anomaly of a Male Collared Trogon (Trogon Collris). Instituto de Ecología, A.C, 2007.