Karnad, Bharat.
Macmillan India, 2005
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edited by Martin Shaw and Henry Coleman
Pitman, 1960
Buku Teks SO
Perpustakaan Nasional, 2000
Buku Referensi
Snyder, Glenn H
Princeton University Press, 1961
Buku Teks
edited by Robert G. Patman
Routledge, 2006
Buku Teks SO