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Buku Teks
Denasty Putri Puspita Aulia, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012
UI - Skripsi (Open)
Tompkins, Al, author
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Buku Teks
Iyengar, Shanto
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Buku Teks
Emery, Edwin, editor
Prentice-Hall, 1962
Buku Teks