Michelli, Joseph A., 1960-, author
McGraw-Hill, 2012
Buku Teks
Halsey, Vicki, author
Berrett Koehler, 2011
Buku Teks
Nadeak, Carry, author
Java Media Indo Plus, 2003
Buku Teks
Garner, James Finn, author
Simon & Schuster , 1997
Buku Teks
Linda, author
American Society for Training & Development, 2010
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