APA (7th ed.) Citation

Burness, G. P., Lefevre, K. L., & Collins, C. T. (1999). Elegant tern: Sterna elegans. Birds of North America, Inc..

Chicago Style (17th ed.) Citation

Burness, Gary P., Kara L. Lefevre, and Charles T. Collins. Elegant Tern: Sterna Elegans. Philadelphia, PA: Birds of North America, Inc., 1999.

MLA (9th ed.) Citation

Burness, Gary P., et al. Elegant Tern: Sterna Elegans. Birds of North America, Inc., 1999.