APA (7th ed.) Citation

Soifer, A. (2009). Mathematics as problem solving (2nd ed.). Springer.

Chicago Style (17th ed.) Citation

Soifer, Alexander. Mathematics as Problem Solving. 2nd ed. New York: Springer, 2009.

MLA (8th ed.) Citation

Soifer, Alexander. Mathematics as Problem Solving. 2nd ed. Springer, 2009.