Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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