Cita APA (7th ed.)

Henkes, K., & Dronzek, L. (1999). Oh! Greenwillow Books.

Cita Chicago (17th ed.)

Henkes, Kevin, i Laura Dronzek. Oh! New York: Greenwillow Books, 1999.

Cita MLA (8th ed.)

Henkes, Kevin, i Laura Dronzek. Oh! Greenwillow Books, 1999.