Cita APA (7th ed.)

International Labor Office & Marga Institute. (1979). The Informal sector of Colombo City, Sri Lanka: A study. Marga Institute.

Cita Chicago (17th ed.)

International Labor Office i Marga Institute. The Informal Sector of Colombo City, Sri Lanka: A Study. Colombo, Sri Lanka: Marga Institute, 1979.

Cita MLA (9th ed.)

International Labor Office i Marga Institute. The Informal Sector of Colombo City, Sri Lanka: A Study. Marga Institute, 1979.