APA (7th ed.) Citation

Mantegazza, G., & Marchi, P. (1992). The hippopotamus. Bell Books.

Chicago Style (17th ed.) Citation

Mantegazza, Giovanna, and Paolo Marchi. The Hippopotamus. Honesdale, Penn.: Bell Books, 1992.

MLA (9th ed.) Citation

Mantegazza, Giovanna, and Paolo Marchi. The Hippopotamus. Bell Books, 1992.