Style de citation APA (7e éd.)

Willis, J., & Ross, T. (2012). Hippospotamus (American ed.). Andersen Press USA : Distributed in the United States by Lerner.

Style de citation Chicago (17e éd.)

Willis, Jeanne, et Tony Ross. Hippospotamus. American ed. Minneapolis: Andersen Press USA : Distributed in the United States by Lerner, 2012.

Style de citation MLA (8e éd.)

Willis, Jeanne, et Tony Ross. Hippospotamus. American ed. Andersen Press USA : Distributed in the United States by Lerner, 2012.