Artikel Jurnal
Kaplan, Abby, author
Cambridge University Press, 2016
Buku Teks
Szafran, Robert F.
Praeger , 1984
Buku Teks
MDF-JRF Secretariat, World Bank Office,, 2012
Buku Teks
Farrell, Warren, author
[American Management Association, ], 2005
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