Cita APA (7th ed.)

Sobel, M. A., & Maletsky, E. M. (1988). Teaching mathematics: A sourcebook of aids, activities, and strategies (2nd ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Sobel, Max A., i Evan M. Maletsky. Teaching Mathematics: A Sourcebook of Aids, Activities, and Strategies. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1988.

Cita MLA (9th ed.)

Sobel, Max A., i Evan M. Maletsky. Teaching Mathematics: A Sourcebook of Aids, Activities, and Strategies. 2nd ed. Prentice-Hall, 1988.