edited by Sandra Prince-EMbury, Donald H. Saklofske
Springer, 2013
Buku Teks
Kail, Robert V.
Prentice Hall International, 2001
Buku Teks
McCandless, Boyd R
Holt Reinhard and Winston, 1967
Buku Teks
Santrock, John W.
McGraw-Hill, 2000
Buku Teks
Santrock, John W.
McGraw-Hill, 2003
Buku Teks