APA (7th ed.) Citation

Ridgely, R. S., & Greenfield, P. J. Aves del Ecuador: Guía de campo.

Chicago Style (17th ed.) Citation

Ridgely, Robert S., and Paul J. Greenfield. Aves Del Ecuador: Guía De Campo.

MLA (8th ed.) Citation

Ridgely, Robert S., and Paul J. Greenfield. Aves Del Ecuador: Guía De Campo.

Warning: These citations may not always be 100% accurate.