Gaya APA

PURBO, O, W., HARTANTO,Aditya,Antonius, . (2001). Dasar-Dasar Operations Reseach (1). : PT.Elex Media Komp..

Gaya MLA

PURBO, Onno, W.., HARTANTO,Aditya,Antonius, . "Dasar-Dasar Operations Reseach". 1 : PT.Elex Media Komp., 2001. Buku.