Klein, Melanie, author
Virago Press , 1989
Buku Teks
edited by Sandra Prince-EMbury, Donald H. Saklofske
Springer, 2013
Buku Teks
Kail, Robert V., author
Prentice Hall International, 2001
Buku Teks SO
McCandless, Boyd R
Holt Reinhard and Winston, 1967
Buku Teks SO
Santrock, John W., author
McGraw-Hill, 2003
Buku Teks SO