Bagchi, Prabodh Chandra, author
Paris Paul Geuthner 1929-1937
Buku Referensi
Lubis, A. Hamid Hasan
Bandung Angkasa 1994
Buku Referensi
Auchter, Thomas
Gottingen Vandenhock & Ruprecht 1999
Buku Referensi
Schmidt, Heinrich, author
New York, Mary S. Rosenberg
Buku Referensi
Apel, Max, 1869-1945, author
Berlin : Walter de Gruyter, 1958
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