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