Cita APA (7th ed.)

Wood, D., & Wood, A. (1996). Piggies. Harcourt.

Cita Chicago (17th ed.)

Wood, Don, i Audrey Wood. Piggies. San Diego, CA: Harcourt, 1996.

Cita MLA (8th ed.)

Wood, Don, i Audrey Wood. Piggies. Harcourt, 1996.