APA (7th ed.) Citation

Brodkorb, P. (1960). How many species of birds have existed? University of Florida.

Chicago Style (17th ed.) Citation

Brodkorb, Pierce. How Many Species of Birds Have Existed? Gainesville: University of Florida, 1960.

MLA (9th ed.) Citation

Brodkorb, Pierce. How Many Species of Birds Have Existed? University of Florida, 1960.

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