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Buku Referensi
Leman
Gramedia Pustaka Utama, 2007
Buku Teks
Bloomfield, Louis A.
John Wiley & Sons, 2010
Buku Teks
Asako Nakai
Center for Asian and Pacific Studies, Seikei University, 2017
Artikel Jurnal
Bloomfield, Louis A.
John Wiley & Sons, 2006
Buku Teks