Rubinstein, M. F., & Firstenberg, I. R. (1995). Patterns of problem solving (2nd ed.). Prentice Hall.
Dyfyniad Arddull ChicagoRubinstein, Moshe F., and Iris Rubinstein Firstenberg. Patterns of Problem Solving. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1995.
Dyfyniad MLARubinstein, Moshe F., and Iris Rubinstein Firstenberg. Patterns of Problem Solving. 2nd ed. Prentice Hall, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.