John Wiley & Sons, 2018
Buku Teks
Alan Lewis, author
Cambridge University Press, 2018
eBooks
Santrock, John W.
McGraw-Hill, 2003
Multimedia
Burton, Lorelle, author
John Wiley & Sons Australia, 2009
Buku Teks
Baron, Robert A., author
Simon & Schuster, 1992
Buku Teks