APA

Cobban W. A., . (1988). Some acanthoceratid ammonites from upper cenomanian (upper cretaceous) rocks of Wyoming. Washington, DC [u.a.]: United States Gov. Print. Office.

Chicago

Cobban William Aubrey, . 1988. Some acanthoceratid ammonites from upper cenomanian (upper cretaceous) rocks of Wyoming. Washington, DC [u.a.]: United States Gov. Print. Office.

Harvard

Cobban W. A., . (1988). Some acanthoceratid ammonites from upper cenomanian (upper cretaceous) rocks of Wyoming. Washington, DC [u.a.]: United States Gov. Print. Office.

MLA

Cobban William Aubrey, . Some acanthoceratid ammonites from upper cenomanian (upper cretaceous) rocks of Wyoming. Washington, DC [u.a.]: United States Gov. Print. Office. 1988.