Gaya APA
Ristono, A., Puryani, .
(2012).
Penelitian Operasional
(
Ed.1, Cet.1)
.
Yogyakarta:
Graha Ilmu.
Gaya MLA
Ristono, Agus., Puryani, .
"Penelitian Operasional".
Ed.1, Cet.1
Yogyakarta:
Graha Ilmu,
2012.
Textbook.