Arasartnam, Sinnappah
Prentice-Hall, 1964
Buku Teks SO
Ludowyk, E.F.C.
Faber and Faber, 1962
Buku Teks SO
Knox, Robert
Ceylon Tisara Prakasakayo, 1966
Buku Teks SO
Ludowyk, E.F.C.
Frederick A. Praeger, 1966
Buku Teks SO
Dewaraja, Lorna Srimanthie
Lake House Investments, 1972
Buku Teks SO