Sinungan, Muchdarsyah, author
Bumi Aksara , 1997
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penyunting Burhan Nurgiyantoro
Pustaka Binaman Pressindo, 1984
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Carlson, Dick, author
Organisation for Economic Co-operation and Devlopment, 1981
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Artikel Jurnal
King, Larry, 1933-, author
Gramedia Pustaka Utama, 1995
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