APA (7th ed.) Citation

Van Leeuwen, J., & Schweninger, A. (1990). Oliver Pig at school. Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Van Leeuwen, Jean, and Ann Schweninger. Oliver Pig at School. New York: Dial Books for Young Readers, 1990.

MLA (8th ed.) Citation

Van Leeuwen, Jean, and Ann Schweninger. Oliver Pig at School. Dial Books for Young Readers, 1990.

Warning: These citations may not always be 100% accurate.