APA (7th ed.) Citation

Hall, M. (2011). Perfect square (1. ed.). Greenwillow Books / HarperCollins.

Chicago Style (17th ed.) Citation

Hall, Michael. Perfect Square. 1. ed. New York: Greenwillow Books / HarperCollins, 2011.

MLA (9th ed.) Citation

Hall, Michael. Perfect Square. 1. ed. Greenwillow Books / HarperCollins, 2011.

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