APA (7th ed.) Citation

Manger, W. L., & Saunders, W. B. (1980). Lower Pennsylvanian, Morrowan, ammonoids from the North American midcontinent.

Chicago Style (17th ed.) Citation

Manger, Walter L., and W. Bruce Saunders. Lower Pennsylvanian, Morrowan, Ammonoids from the North American Midcontinent. Tulsa, Okla, 1980.

MLA (9th ed.) Citation

Manger, Walter L., and W. Bruce Saunders. Lower Pennsylvanian, Morrowan, Ammonoids from the North American Midcontinent. 1980.