APA (7th ed.) Citation

Numeroff, L. J., & McPhail, D. (2006). When sheep sleep. Harry N. Abrams.

Chicago Style (17th ed.) Citation

Numeroff, Laura Joffe, and David McPhail. When Sheep Sleep. New York: Harry N. Abrams, 2006.

MLA (8th ed.) Citation

Numeroff, Laura Joffe, and David McPhail. When Sheep Sleep. Harry N. Abrams, 2006.

Warning: These citations may not always be 100% accurate.