Buckley, P. A., & Buckley, F. G. (2002). Royal tern: Sterna maxima. Birds of North America, Inc..
Chicago Style (17th ed.) CitationBuckley, P. A., and Francine G. Buckley. Royal Tern: Sterna Maxima. Philadelphia, Pa.: Birds of North America, Inc., 2002.
MLA (9th ed.) CitationBuckley, P. A., and Francine G. Buckley. Royal Tern: Sterna Maxima. Birds of North America, Inc., 2002.
Warning: These citations may not always be 100% accurate.