Grant, E. L., Ireson, W. G., Leavenworth, R. S., & Ireson, W. G. (1967). Principles of engineering economy (6th ed.). New York: Ronald Press.
Παραπομπή Chicago StyleGrant, Eugene Lodewick, William Grant Ireson, Richard S. Leavenworth, and W. Grant Ireson. Principles of Engineering Economy. 6th ed. New York: Ronald Press, 1967.
Παραπομπή MLAGrant, Eugene Lodewick, William Grant Ireson, Richard S. Leavenworth, and W. Grant Ireson. Principles of Engineering Economy. 6th ed. New York: Ronald Press, 1967.
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