Marton, L., & Hornyak, W. F. (1969). Problems and solutions for students. New York: Academic Press.
Παραπομπή Chicago StyleMarton, L., and W. F. Hornyak. Problems and Solutions for Students. New York: Academic Press, 1969.
Παραπομπή MLAMarton, L., and W. F. Hornyak. Problems and Solutions for Students. New York: Academic Press, 1969.
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