APA (7th ed.) Citation

Van Leeuwen, J., & Schweninger, A. (2006). Oliver Pig and the best fort ever. Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Van Leeuwen, Jean, and Ann Schweninger. Oliver Pig and the Best Fort Ever. New York: Dial Books for Young Readers, 2006.

MLA (8th ed.) Citation

Van Leeuwen, Jean, and Ann Schweninger. Oliver Pig and the Best Fort Ever. Dial Books for Young Readers, 2006.