Jayasuriya, Shihan De Silva, author
Tauris Academic Studies, 2008
Buku Teks
Disney, A.R, author
Cambridge University Press, 2009
Buku Teks
Sickle, C.E. van, author
Houghton Mifflin, 1947
Buku Teks
Hall, Walter Phelps, author
Ginn and Company, 1953
Buku Teks
Mitchell, Mairin, author
Sidgwick and Jackson, 1949
Buku Teks