Hill, Napoleon
Jeremy P. Tarcher/Penguin, 2008
Buku Teks
Morris, Thomas V.
G.P. Putnam`s Sons, 1994.
Buku Teks SO
Morris, Thomas V.
Tianxia Wenhua Chubanshe, 1996
Buku Teks
Bono, Edward de
Fontana, 1991
Buku Teks
Pietrzak, Theodore
[American Society for Training and Development Press;;, ], 2005
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