Hastings, Sandra
American Society for Training and Development Press, 2005
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Ahmad Qurtubi
2011
Artikel Jurnal
edited by Rosemary Clark, D.W. Livingstone, and Harry Smaller
Sense, 2012
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Mantyla, Karen
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks
Utley, Andrea
Taylor and Francis, 2008
Buku Teks