edited by Robert T. Woods
John Wiley & Sons, 1999
Buku Teks
Sarason, Seymour B., author
Harper & Row , 1959
Buku Teks
edited by M.J. Denham
University Park Press, 1980
Buku Teks
Veeraraghavan, Vimala, author
Sage, 2002
Buku Teks
Miller, Robert D.
An Aspen Publication, 1996
Buku Teks