APA (7th ed.) Citation

Michels, T., & Michl, R. (1989). At the frog pond (1st American ed.). Lippincott.

Chicago Style (17th ed.) Citation

Michels, Tilde, and Reinhard Michl. At the Frog Pond. 1st American ed. New York: Lippincott, 1989.

MLA (9th ed.) Citation

Michels, Tilde, and Reinhard Michl. At the Frog Pond. 1st American ed. Lippincott, 1989.