Penders, C. L. M. (Christiaan Lambert Maria)
Oxford University Press, 1974
Buku Teks
Prasad, Ishwari
Bombay, dsb. : Orient Longmans Ltd., (1955).
Buku Teks
Bryson, Bill
Broadway Books, 2006
Buku Teks
Bolton, Geoffrey Curgenven
Melbourne University Press, 1958
Buku Teks
Kay, Dennis
Twayne, 1995
Buku Teks