Beakley, G. C., Leach, H. W., & Hedrick, J. K. (1977). Engineering an introduction to a creative profession (3rd ed.). New York : London: Macmillan Publishing Co., Inc. ; Collier Macmillan Publishers.
Παραπομπή Chicago StyleBeakley, George C., H. W. Leach, and J. Karl Hedrick. Engineering an Introduction to a Creative Profession. 3rd ed. New York : London: Macmillan Publishing Co., Inc. ; Collier Macmillan Publishers, 1977.
Παραπομπή MLABeakley, George C., H. W. Leach, and J. Karl Hedrick. Engineering an Introduction to a Creative Profession. 3rd ed. New York : London: Macmillan Publishing Co., Inc. ; Collier Macmillan Publishers, 1977.
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