APA (7th ed.) Citation

Lerner, M. R., & Overlie, G. (1959). Peter gets the chickenpox. Medical Books for Children.

Chicago Style (17th ed.) Citation

Lerner, Marguerite Rush, and George Overlie. Peter Gets the Chickenpox. Minneapolis, Minn.: Medical Books for Children, 1959.

MLA (9th ed.) Citation

Lerner, Marguerite Rush, and George Overlie. Peter Gets the Chickenpox. Medical Books for Children, 1959.