Connolly, James E.
Burges Publishing, 1974
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Pandjaitan, Ivan Sahat Hartawan, author
Universitas Indonesia, 2006
UI - Tesis (Membership)
PSIKOM Univ Budi Luhur, 2015
Majalah, Jurnal, Buletin
Universitas Budi Luhur,
Majalah, Jurnal, Buletin
Holmes, David, author
Sage, 2005
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