Kuther, Tara L.
Wadsworth and Cengage Learning, 2012
Buku Teks SO
Kuther, Tara L.
Wardworth, 2012
Buku Referensi
John Wiley & Sons, 2003
Buku Teks SO
Heiserman, David L.
Prentice-Hall, 1977
Buku Referensi
Eysenck, Michael W.
Psychology Press, 1995
Buku Referensi