APA (7th ed.) Citation

Bellrose, F. C. (1968). Waterfowl migration corridors east of the Rocky Mountains in the United States. State of Illinois, Natural History Survey Division.

Chicago Style (17th ed.) Citation

Bellrose, Frank C. Waterfowl Migration Corridors East of the Rocky Mountains in the United States. Urbana: State of Illinois, Natural History Survey Division, 1968.

MLA (9th ed.) Citation

Bellrose, Frank C. Waterfowl Migration Corridors East of the Rocky Mountains in the United States. State of Illinois, Natural History Survey Division, 1968.