APA aipamena

GRANT, E. L., IRESON, W., & LEAVENWORTH, R. S. (1990). Principles of engineering economy.-- ed.8. John Wiley and Sons.

Chicago Style aipamena

GRANT, Eugene L., W.Grant IRESON, and Richard S. LEAVENWORTH. Principles of Engineering Economy.-- Ed.8. New York: John Wiley and Sons, 1990.

MLA aipamena

GRANT, Eugene L., et al. Principles of Engineering Economy.-- Ed.8. John Wiley and Sons, 1990.