International Labor Office & Marga Institute. (1979). The Informal sector of Colombo City, Sri Lanka: A study. Marga Institute.
Citace podle Chicago (17th ed.)International Labor Office a Marga Institute. The Informal Sector of Colombo City, Sri Lanka: A Study. Colombo, Sri Lanka: Marga Institute, 1979.
Citace podle MLA (9th ed.)International Labor Office a Marga Institute. The Informal Sector of Colombo City, Sri Lanka: A Study. Marga Institute, 1979.
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