Solso, Robert L., 1933-, author
Allyn and Bacon, 2001
Buku Teks
Galotti, Kathleen M.
Brooks/Cole, 1999
Buku Teks
Hunt, R. Reed, author
McGraw-Hill, 1999
Buku Teks
Howes, Mary B., author
Pergamon Press , 1990
Buku Teks
Anderson, John R., author
N.Y. Worth, 2015
Buku Teks