Cita APA (7a ed.)

Beaumont, K., & Urbanovic, J. (2011). No sleep for the sheep! Houghton Children Books.

Cita Chicago Style (17a ed.)

Beaumont, Karen, y Jackie Urbanovic. No Sleep for the Sheep! Boston: Houghton Children Books, 2011.

Cita MLA (8a ed.)

Beaumont, Karen, y Jackie Urbanovic. No Sleep for the Sheep! Houghton Children Books, 2011.