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Buku Teks SO
Kluwer Academic Publishers, 2018
Majalah, Jurnal, Buletin
Endang Sri Purwanti
Fakultas Teknik Universitas Indonesia, 2012
UI - Tesis Open
Dror, Yehezkel
Elsevier, 1978
Buku Teks SO
Weimer, David L.
Prentice-Hall, 1992
Buku Teks SO