Παραπομπή APA
Grant, E. L., Ireson, G. W., & Leavenworth, R. S. (1976). Principles of Engineering Economy (6th edition.). New York: John Wiley & Sons.
Παραπομπή Chicago StyleGrant, Eugene L., Grant W. Ireson, and Richard S. Leavenworth. Principles of Engineering Economy. 6th edition. New York: John Wiley & Sons, 1976.
Παραπομπή MLAGrant, Eugene L., Grant W. Ireson, and Richard S. Leavenworth. Principles of Engineering Economy. 6th edition. New York: John Wiley & Sons, 1976.
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