Sullivan, W. G., Wicks, E. M., Koelling, C. P. 1., & De Garmo, E. P. (2012). Engineering economy (15th ed., International ed.). Pearson.
Lua i Stíl Chicago (17ú heag.)Sullivan, William G., Elin M. Wicks, C. Patrick 1953 Koelling, agus E. Paul De Garmo. Engineering Economy. 15th ed., International ed. Boston: Pearson, 2012.
Lua MLA (9ú heag.)Sullivan, William G., et al. Engineering Economy. 15th ed., International ed. Pearson, 2012.
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