Sobel, M. .., & Maletsky, E. M. j. a. (1975). Teaching mathematics: A sourcebook of aids, activities and stragtegies. Prentice-Hall.
Chicago Style (17. basım) AtıfSobel, Max .A, ve Evan M. joint auth Maletsky. Teaching Mathematics: A Sourcebook of Aids, Activities and Stragtegies. Englewood Cliffs, N. J: Prentice-Hall, 1975.
MLA (9th ed.) AtıfSobel, Max .A, ve Evan M. joint auth Maletsky. Teaching Mathematics: A Sourcebook of Aids, Activities and Stragtegies. Prentice-Hall, 1975.
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