Sorensen, Georg, author
Pustaka Pelajar, 2003
Buku Teks
Baechler, Jean, author
Kanisius, 2001
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Di Palma, Giuseppe
Yayasan Sumber Agung, 1997
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Artikel Jurnal
Dahl, Robert A., 1915-2014, author
Yayasan Pustaka Obor Indonesia, 1992
Buku Teks