Gaya APA

DeGarmo, E, P. (2001). Ekonomi teknik . Jilid 2 Engineeering economy (2001). : Jakarta : PT. Prenhallindo,.

Gaya MLA

DeGarmo, E, Paul. "Ekonomi teknik . Jilid 2 Engineeering economy". 2001 : Jakarta : PT. Prenhallindo,, 2001. Text.