APA (7th ed.) Citation

Schaefer, L. M., & Hartung, S. K. (2008). What's that, Mittens? HarperCollins.

Chicago Style (17th ed.) Citation

Schaefer, Lola M., and Susan Kathleen Hartung. What's That, Mittens? New York: HarperCollins, 2008.

MLA (8th ed.) Citation

Schaefer, Lola M., and Susan Kathleen Hartung. What's That, Mittens? HarperCollins, 2008.

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