Gaya APA

Tampubolon, M., Sikumbang, R. (2004). Manajemen operasional (operations management) (Cet.1). Jakarta: Ghalia Indonesia.

Gaya MLA

Tampubolon, Manahan., Sikumbang, Risman. "Manajemen operasional (operations management)". Cet.1 Jakarta: Ghalia Indonesia, 2004. Text.