Yalman, Nur, author
I. B. Tauris, 2009
Buku Teks
Ray, Sibnarayan
Melbourne and Sydney : Thomas Nelson (Austrakia) Ltd., 1966.
Buku Teks
Burgess, Peter H., author
Graham Brash, 1983
Buku Referensi
edited by Gun Lauritzson
Lund University, 1992
Buku Referensi
Palmer, Vance, author
Longman Cheshire, 1981
Buku Teks