APA (7th ed.) Citation

Zelenko, H., & Bermúdez, P. Orchids species of Perú.

Chicago Style (17th ed.) Citation

Zelenko, Harry, and Pablo Bermúdez. Orchids Species of Perú.

MLA (8th ed.) Citation

Zelenko, Harry, and Pablo Bermúdez. Orchids Species of Perú.

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