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
Multimedia
Passer, Michael W.
McGraw-Hill, 2007
Multimedia
Passer, Michael W.
McGraw-Hill, 2009
Buku Teks SO