Allen, Jon G, author
American Psychiatric Publishing, 2005
Buku Teks
Arapoff, Nancy
Holt, Rinehart and Winston, 1970
Buku Teks
Schrag, Clarence C., author
Harper & Row, 1963
Buku Teks
Ginsberg, Morris
Buku Teks
Zanden, James W. Vander, author
John Wiley & Sons, 1979
Buku Teks