Hinde, Robert A., author
McGraw-Hill, 1974
Buku Teks
Lawrence Erlbaum Associates, Publishers, , 2005.
Buku Teks
edited by Ralph L. Bisco
John Wiley & Sons, 1970
Buku Teks
Hewitt, Paul G., author
Pearson - Addison Wesley, 2008
Buku Teks
Leddy, Susan, author
Lippincott , 1985
Buku Teks