Marbun, Dorlina Surianta, author
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UI - Tesis (Membership)
Kwee, John B.
Hodder & Stoughton , 1976
Buku Teks
Hose, Charles, 1863-1929, author
Oxford University Press, 1993
Buku Teks
Robquain, Charles, author
Longmans, 1958
Buku Teks
Muller, Kal, author
Periplus,, 1992
Buku Referensi