Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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