Gaya APA

DeGarmo, E, P. (1999). Ekonomi teknik . Jilid 1 Engineeering economy (1999). : Jakarta : PT. Prenhallindo,.

Gaya MLA

DeGarmo, E, Paul. "Ekonomi teknik . Jilid 1 Engineeering economy". 1999 : Jakarta : PT. Prenhallindo,, 1999. Text.