El-Haik, Basem
John Wiley & Sons, 2006
Buku Teks SO
Antony, Jiju
Emerald Publishing Limited, 2019
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George, Michael L.
McGraw-Hill, 2003
Buku Teks
Schonberger, Richard John
John Wiley & Sons, 2008
Buku Teks
Asana Kusnadi
Institut Teknologi Bandung, 2016
Artikel Jurnal