Gaya APA
SUBAGYO, P. et al
(1985).
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(
2)
.
Yogyakarta:
BPFE-YOGYAKARTA.
Gaya MLA
SUBAGYO, PANGESTU. et al.
"Dasar-Dasar Operation Research".
2
Yogyakarta:
BPFE-YOGYAKARTA,
1985.
Text.