APA Style
Napitupulu, Juanda. (1998).
Operation research (1).
Malang:
Whitney.
Chicago Style
Napitupulu, Juanda.
Operation research.
1
Malang:
Whitney,
1998.
Text.
MLA Style
Napitupulu, Juanda.
Operation research.
1
Malang:
Whitney,
1998.
Text.
Turabian Style
Napitupulu, Juanda.
Operation research.
1
Malang:
Whitney,
1998.
Print.