APA (7th ed.) Citation

Reys, R. E., Lindquist, M. M., & Suydam, M. N. (1989). Helping children learn mathematics (2nd ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Reys, Robert E., Mary Montgomery Lindquist, and Marilyn N. Suydam. Helping Children Learn Mathematics. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1989.

MLA (9th ed.) Citation

Reys, Robert E., et al. Helping Children Learn Mathematics. 2nd ed. Prentice Hall, 1989.