APA (7th ed.) Citation

Heuck, S. (1990). Pony and Bear are friends (1. American ed.). Knopf.

Chicago Style (17th ed.) Citation

Heuck, Sigrid. Pony and Bear Are Friends. 1. American ed. New York: Knopf, 1990.

MLA (9th ed.) Citation

Heuck, Sigrid. Pony and Bear Are Friends. 1. American ed. Knopf, 1990.