Tortora, Gerald J.
Wiley, Hoboken, NJ., 2017
Buku Teks SO
Tortora, Gerard J.
Harper & Row, 1990
Buku Teks SO
John Wiley & Sons, 2016
Buku Teks SO
Tortora, Gerard J.
John Wiley & Sons, 2011
Buku Teks SO
Swisher, Linda
Mosby Elsevier, 2010
Buku Referensi