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Artikel Jurnal
Ikhsan Wahyudi
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Tugas Akhir
Gregg, Davis Weiner
University of Pennsylvania by R.D. Irwin, 1962
Buku Teks
Department of Information Republic of Indonesia
Department of Information Republic of Indonesia, 1994
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Greeg, Davis W.
Richard D. Irwin, Inc., 1960
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