Sarason, Seymour B.
Harper & Row , 1959
Buku Teks
edited by M.J. Denham
University Park Press, 1980
Buku Teks
Veeraraghavan, Vimala
Sage, 2002
Buku Teks
Miller, Robert D.
An Aspen Publication, 1996
Buku Teks
Gorline, Lynne Lesak
Mosby , 1982
Buku Teks