APA (7th ed.) Citation

Wilson, Z., & Adinolfi, J. (2006). A circle in the sky. Children's Press.

Chicago Style (17th ed.) Citation

Wilson, Zachary, and JoAnn Adinolfi. A Circle in the Sky. New York: Children's Press, 2006.

MLA (9th ed.) Citation

Wilson, Zachary, and JoAnn Adinolfi. A Circle in the Sky. Children's Press, 2006.