Herman, Irving P.
Springer New York : Imprint : Springer, 2016
Buku Teks SO
Vander, Arthur
McGraw-HIll, 2001
Buku Teks SO
Patton, Kevin T.
Elsevier, 2010
Buku Referensi
McCall, Richard P
Johns Hopkins University Press, 2010
Buku Teks SO
Winston, Robert
BBC Worldwide Limited, 2004
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