Sloyer, Clifford W., author
Addison-Wesley, 1970
Buku Teks
Jayaraman, Sundaresan, author
McGraw-Hill, 1991
Buku Teks
American Psychological Association, 2004
Buku Teks
edited by Richard K. Riegelman, Gail J. Povar
Brown and comp, 1988
Buku Teks
Proctor, Tony
Routledge, Taylor & Francis Group, 1999
Buku Teks