APA aipamena

Eisermann, K., & Schulz, U. (2005). Birds of a high-altitude cloud forest in Alta Verapaz, Guatemala.

Chicago Style aipamena

Eisermann, Knut, y Ulrich Schulz. Birds of a High-altitude Cloud Forest in Alta Verapaz, Guatemala. 2005.

MLA aipamena

Eisermann, Knut, y Ulrich Schulz. Birds of a High-altitude Cloud Forest in Alta Verapaz, Guatemala. 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.