APA (7th ed.) Citation

Illingworth, M. (1996). Real-life math problem solving. Scholastic Professional Books.

Chicago Style (17th ed.) Citation

Illingworth, Mark. Real-life Math Problem Solving. New York: Scholastic Professional Books, 1996.

MLA (9th ed.) Citation

Illingworth, Mark. Real-life Math Problem Solving. Scholastic Professional Books, 1996.