West, Allan M.
The Free Press, 1980
Buku Teks
Ornstein, Allan C.
Houghton Mifflin, 1985
Buku Teks
Jossey - Bass Publishers , 1996
Buku Teks
Myers, Charles Nash, author
Princeton University , 1965
Buku Teks
Minster of National Education, 2005
Buku Teks