Bilgrami, K.S.
Today & Tomorrow's Printers & Publishers, 1979
Buku Referensi
Sharma, O.P., 1953-
Tata McGraw-Hill, 2011
Buku Teks
Cooke, Roderic, author
John Wiley & Sons, 1977
Buku Teks
Kohlmeyer, Jan, author
Academic Press, 1979
Buku Teks
Grigoriu, D.
Editiones Roche, 1984
Buku Teks