Kotter, John P., 1947-, author
Erlangga, 1993
Buku Teks
Scott, John, author
Spere British Institute of Management, 1984
Buku Teks
Atwood, Christee Gabour
ASTD Press, 2008
Buku Teks
Munson, Lawrence S., author
McGraw-Hill, 1984
Buku Teks
Deverell, C.S., author
London, Gee & Co
Buku Teks