APA (7th ed.) Citation

U.S. Fish and Wildlife Service. (1942). Blackbirds and Grain Crops in the Eastern United States, June 1942. [s.n.].

Chicago Style (17th ed.) Citation

U.S. Fish and Wildlife Service. Blackbirds and Grain Crops in the Eastern United States, June 1942. [Washington]: [s.n.], 1942.

MLA (9th ed.) Citation

U.S. Fish and Wildlife Service. Blackbirds and Grain Crops in the Eastern United States, June 1942. [s.n.], 1942.