APA (7th ed.) Citation

Cobban, W. A. (1971). New and little-known ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the western interior of the United States. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Cobban, William A. New and Little-known Ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the Western Interior of the United States. Washington: U.S. Govt. Print. Off, 1971.

MLA (9th ed.) Citation

Cobban, William A. New and Little-known Ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the Western Interior of the United States. U.S. Govt. Print. Off, 1971.