Great Britain. Commercial Relations and Exports Dept & Thorogood, C. E. (1955). Ceylon: Economic and commercial conditions in Ceylon, September, 1954. H.M.S.O.
Chicago-viite (17. p.)Great Britain. Commercial Relations and Exports Dept ja C. E. Thorogood. Ceylon: Economic and Commercial Conditions in Ceylon, September, 1954. London: H.M.S.O, 1955.
MLA-viite (8. p.)Great Britain. Commercial Relations and Exports Dept ja C. E. Thorogood. Ceylon: Economic and Commercial Conditions in Ceylon, September, 1954. H.M.S.O, 1955.
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