International Labour Office & Sethuraman, S. V. (1981). The urban informal sector in developing countries: Employment, poverty and environment. International Labour Office.
Cita Chicago (17th ed.)International Labour Office i S. V. Sethuraman. The Urban Informal Sector in Developing Countries: Employment, Poverty and Environment. Geneva: International Labour Office, 1981.
Cita MLA (8th ed.)International Labour Office i S. V. Sethuraman. The Urban Informal Sector in Developing Countries: Employment, Poverty and Environment. International Labour Office, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.