Lawrenhce Erlbaum Associates,, 2014
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Artikel Jurnal
Gordon, Edward E.
[American Society for Training and Development Press;American Society for Training and Development Press, American Society for Training and Development Press], 1997
eBooks
Thomas Potthast, editor
[, Wageningen Academic], 2012
eBooks
Coles, Robert
The Atlantic Monthly Press, 1986
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