Ratcliffe, Matthew, author
Palgrave Macmillan, 2007
Buku Teks
Teo, Thomas, author
Springer, 2005
Buku Teks
Santrock, John W., author
W.C. Brown Publisher, 1991
Buku Referensi
Coon, Dennis, author
Wadsworth , 2001
Buku Teks
Coon, Dennis, author
MA Cengage Learning, 2016
Buku Teks