Book House Training Centre/Unesco
Book House Training Centre, 1991
Buku Referensi
Carlaw, Peggy, author
McGraw-Hill , 1999
Buku Teks
Mikula, Jim, author
American Society for Training and Development Press;, 2004
eBooks
Jobber, David, author
Prentice-Hall, 2000
Buku Teks
Newstrom, John W., author
McGraw-Hill, 1997
Buku Teks