Meyer, Stephenie, 1973-, author
Gramedia Pustaka Utama, 2009
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Artikel Jurnal
Baldwin, Ralph B., author
McGraw-Hill, c1965
Buku Teks
Boyce, Peter John
University of Queensland Press, 1977
Buku Teks
Thakur, Ramesh
London: Westview Press, 1986,
Buku Referensi