Duncan, W. Jack, author
Blackwell, 1999
Buku Teks
Duncan, W. Jack, author
Blackwell, 1995
Buku Teks
Goldsmith, Seth B., author
An Aspen, 1981
Buku Teks
Ginter, Peter M., author
Jossey-Bass, 2014
Buku Teks
Schmele, June A.
Delmar Publisher , 1996
Buku Teks