Martindale, Colin
Grave California Brooks , 1990
Buku Teks
Goldstein, E. Bruce, author
Thomson Wadsworth, 2008
Buku Teks
Medin, Douglas L., author
Harcourt College Publisher, 2001
Buku Teks
Solso, Robert L., 1933-, author
Allyn and Bacon, 2001
Buku Teks
Verner, M. D., author
Penguin Books , 1971
Buku Teks