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Adobe Press, 1995
Buku Teks
Kovsky, Steve, author
Que Publishing, 2004
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edited by Katherine Blashki, Pedro Isaias
Information Science Reference, 2014
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Gema Mawardi, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012
UI - Skripsi (Open)
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Springer-Verlag , 2012
eBooks