APA (7th ed.) Citation

Duckworth, E., Hille-Brandts, L., & Otto, D. (1969). If I were. Childrens Press.

Chicago Style (17th ed.) Citation

Duckworth, Elisabeth, Lene Hille-Brandts, and Doris Otto. If I Were. Chicago: Childrens Press, 1969.

MLA (9th ed.) Citation

Duckworth, Elisabeth, et al. If I Were. Childrens Press, 1969.