Gaya APA

Subagyo, P. et al (1999). Dasar-Dasar Operations Research (Ed. 2, Cet. XII). Gorontalo: BPFE yogyakarta.

Gaya MLA

Subagyo, Pangestu. et al. "Dasar-Dasar Operations Research". Ed. 2, Cet. XII Gorontalo: BPFE yogyakarta, 1999. Text.