GRANT, E. L., IRESON, W. G., & LEAVENWORTH, R. S. (1982). Principles of engineering economy.-- Ed.7. John Wiley and Sons.

GRANT, Eugene L., W. Grant IRESON, and Richard S. LEAVENWORTH. Principles of Engineering Economy.-- Ed.7. New York: John Wiley and Sons, 1982.

GRANT, Eugene L., et al. Principles of Engineering Economy.-- Ed.7. John Wiley and Sons, 1982.