Arasartnam, Sinnappah
Prentice-Hall, 1964
Buku Teks
Bailey, Sydney D.
William Brendon ans Son, 1952
Buku Teks
Ludowyk, E.F.C.
Faber and Faber, 1962
Buku Teks
Amerasinghe, Anthony Ranjit Bevis
Lake House Investments, 1971
Buku Teks
Kearney, Robert N.
Cornell University Press, 1973
Buku Teks