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Hutchirson & Co., 1968
Buku Teks
Peterson, Brooks
Intercultural Press, 2004
Buku Teks
Benda, Julien, author
Gramedia Pustaka Utama, 1997
Buku Teks
Fifi F. Embut, author
1989
UI - Skripsi (Membership)
Marbun, Johannes, author
1997
UI - Tesis (Membership)