Gaya APA

Degarmo,{et.all}, E, P. (1999). Ekonomi Teknik : Engineering Economy Tenth Edition Jilid 1 (Edisi 10). Asia: Prentice-Hall, Inc.

Gaya MLA

Degarmo,{et.all}, E., Paul. "Ekonomi Teknik : Engineering Economy Tenth Edition Jilid 1". Edisi 10 Asia: Prentice-Hall, Inc, 1999. Text.