APA-Zitierstil (7. Ausg.)

Kennedy, W. J., Cobban, W. A., & Landman, N. H. (1996). Two species of Placenticeras (Ammonitina) from the Upper Cretaceous (Campanian) of the Western Interior of the United States. American Museum of Natural History.

Chicago-Zitierstil (17. Ausg.)

Kennedy, William J., William A. Cobban, und Neil H. Landman. Two Species of Placenticeras (Ammonitina) from the Upper Cretaceous (Campanian) of the Western Interior of the United States. New York, N.Y: American Museum of Natural History, 1996.

MLA-Zitierstil (9. Ausg.)

Kennedy, William J., et al. Two Species of Placenticeras (Ammonitina) from the Upper Cretaceous (Campanian) of the Western Interior of the United States. American Museum of Natural History, 1996.