Dickson, Paul, author
Facts on file, 1986
Buku Teks
Palmer, Spencer J.
Po Chim Chai, 1986
Buku Teks
Halla, Pai Huhm
Hollym International, [1980;1980, 1980]
Buku Teks
Valenti, Diane, author
American Society for Training & Development, 2011
eBooks
E.P Dutton, 1987
Buku Teks