APA цитиране

Cobban, W. A., & Hook, S. C. (1980). The Upper Cretaceous (Turonian) ammonite family Coilopoceratidae Hyatt in the western interior of the United States. Washington, DC: U.S. Gov. Print. Off.

Чикагска система за цитиране

Cobban, William Aubrey, и Stephen C. Hook. The Upper Cretaceous (Turonian) Ammonite Family Coilopoceratidae Hyatt in the Western Interior of the United States. Washington, DC: U.S. Gov. Print. Off, 1980.

MLA формат за цитиране

Cobban, William Aubrey, и Stephen C. Hook. The Upper Cretaceous (Turonian) Ammonite Family Coilopoceratidae Hyatt in the Western Interior of the United States. Washington, DC: U.S. Gov. Print. Off, 1980.