APA (7th ed.) Citation

D'Angelo, J. P., & West, D. B. (1997). Mathematical thinking: Problem-solving and proofs. Prentice Hall.

Chicago Style (17th ed.) Citation

D'Angelo, John P., and Douglas B. West. Mathematical Thinking: Problem-solving and Proofs. Upper Saddle River, NJ: Prentice Hall, 1997.

MLA (8th ed.) Citation

D'Angelo, John P., and Douglas B. West. Mathematical Thinking: Problem-solving and Proofs. Prentice Hall, 1997.