Gaya APA
Subagyo, P.
(2000).
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.
Yogyakarta:
BPFE-YOGYAKARTA.
Gaya MLA
Subagyo, Pangestu.
"Dasar-Dasar Operations Research : Edisi 2".
Yogyakarta:
BPFE-YOGYAKARTA,
2000.
Text.