Style de citation APA (7e éd.)

Kennedy, W., Landman, N., Cobban, W., & Scott, G. (2000). Late campanian (cretaceous) heteromorph ammonites from the western interior of the United States.

Style de citation Chicago (17e éd.)

Kennedy, W., N. Landman, W. Cobban, et G. Scott. Late Campanian (cretaceous) Heteromorph Ammonites from the Western Interior of the United States. 2000.

Style de citation MLA (9e éd.)

Kennedy, W., et al. Late Campanian (cretaceous) Heteromorph Ammonites from the Western Interior of the United States. 2000.