Rawlins, Karen
MacMillan Press , 1993
Buku Teks SO
Higgins, James M.
Random House Business Division, 1982
Buku Teks SO
Rutherfoord, Andrea J.
Prentice-Hall, 2001
Buku Teks SO
Sully, Philippa
Elsevier, 2005
Buku Teks SO
Orey, Maureen
American Society for Training and Development Press;, 2004
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