Kumar, Nirmal
Bharatiya Vidya Bhavan, 1979
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Vira, Raghu
International Academy of Indian Culture, 1950
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edited by Arvind Krishna Mehrotra
Permanent Black in association with Ravi Dayal Publishers, 2003
Buku Teks SO
Protherough, Robert
Open University Press, 1991
Buku Teks SO
Vira, Raghu
Secretary The International Academy of Indian Culture, 1950
Buku Referensi