Field, John, author
Routledge, 2005
Buku Teks
Steinberg, Danny D., author
Longman, 1982
Buku Teks
Borsboom, Denny, author
Cambridge university press , 2005
Buku Teks
edited by Jeannette Marie Mageo and Alan Howard
Routledge, 1996
Buku Teks
Raffman, Diana
MIT Press, 1993
Buku Teks