APA (7th ed.) Citation

Hoban, T. (1998). So many circles, so many squares. Greenwillow Books.

Chicago Style (17th ed.) Citation

Hoban, Tana. So Many Circles, so Many Squares. New York: Greenwillow Books, 1998.

MLA (8th ed.) Citation

Hoban, Tana. So Many Circles, so Many Squares. Greenwillow Books, 1998.