BLANK, L. T., & TARQUIN, A. J. (1998). Engineering economy.-- Ed.4. McGraw-Hill International.

BLANK, Leland T., and Anthony J. TARQUIN. Engineering Economy.-- Ed.4. Singapore: McGraw-Hill International, 1998.

BLANK, Leland T., and Anthony J. TARQUIN. Engineering Economy.-- Ed.4. McGraw-Hill International, 1998.