THUESEN, H., FABRICKY, W., & THUESEN, G. (1981). Engineering economy -- Ed. 5. Prentice-Hall of India.
Lua i Stíl Chicago (17ú heag.)THUESEN, H.G, W.J FABRICKY, agus G.J THUESEN. Engineering Economy -- Ed. 5. New Delhi: Prentice-Hall of India, 1981.
Lua MLA (9ú heag.)THUESEN, H.G, et al. Engineering Economy -- Ed. 5. Prentice-Hall of India, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.