Stetler, David A.
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Buku Teks
Gardner, Eldon J.
Burgess Publishing, 1965
Buku Teks
Panikkar, K.M.
George Allen and Unwin, 1951
Buku Teks
New Delhi, India : Indian Council for Cultural Relation
Majalah, Jurnal, Buletin
Iyer, Nandhini
ABC Publishing House , 1985
Buku Teks