GRANT, E. L., IRESON, W. G., & LEAVENWORTH, R. S. (1982). Principles of engineering economy.-- Ed.7. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)GRANT, Eugene L., W. Grant IRESON, agus Richard S. LEAVENWORTH. Principles of Engineering Economy.-- Ed.7. New York: John Wiley and Sons, 1982.
Lua MLA (9ú heag.)GRANT, Eugene L., et al. Principles of Engineering Economy.-- Ed.7. John Wiley and Sons, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.