APA (7th ed.) Citation

Heos, B., & Comins, A. (2013). Stronger than steel. Houghton Mifflin Books for Children.

Chicago Style (17th ed.) Citation

Heos, Bridget, and Andy Comins. Stronger than Steel. New York: Houghton Mifflin Books for Children, 2013.

MLA (9th ed.) Citation

Heos, Bridget, and Andy Comins. Stronger than Steel. Houghton Mifflin Books for Children, 2013.

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