Ronald Van Kempen; Gideon Bolt; Maarten Van Ham, editors
Routledge, Taylor & Francis Group, 2018
Buku Teks
edited by Therese O'Malley and Marc Treib
Dumbarton Oaks, 1995
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Lewis, Philip H., author
John Wiley & Sons, 1996
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Labin, Jenn, author
American Society for Training & Development, 2010
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