Gross, Richard D.
Pustaka Pelajar, 2013
Buku Teks SO
Flanagan, Owen J.
MIT Press, 1991
Buku Teks SO
Santrock, John W.
W.C. Brown Publisher, 1991
Buku Referensi
Passer, Michael W.
McGraw-Hill, 2007
Buku Teks SO
Passer, Michael W.
McGraw-Hill, 2007
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