Veronica
2016
UI - Skripsi (Membership)
Yin, Robert K.
Rajawali, 2013
Buku Teks
Peterson, Robert A.
Sage Publications, Inc., 2000
Buku Teks
Departemen Kesehatan, 1998
Buku Teks
Conway, Mal
American Society for Training & Development Press, 2003
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