Spaan, Ernst
Labour migration from Sri Lanka to the Middle East / ernst Spaan
University of Leiden, 1989
 Buku Teks SO
Silva, M.A. de
Communication policies in Sri Lanka
UNESCO, 1977
 Buku Teks SO
Kearney, Robert N.
The politics of Ceylon (Sri Lanka)
Cornell University Press, 1973
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Hulugalle, H.A.J.
Guide to Ceylon (Sri Lanka)/ H.A.J. Hulugalle
Lake House Investments, 1969
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Diyasena, W.
Pre-vocational education in Sri Lanka / by W. Diyasena
Unesco, 1976
 Buku Teks