APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (8. izdanje)

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