International Labour Office & Sethuraman, S. V. (1981). The urban informal sector in developing countries: Employment, poverty and environment. International Labour Office.
Chicago-referens (17:e uppl.)International Labour Office och S. V. Sethuraman. The Urban Informal Sector in Developing Countries: Employment, Poverty and Environment. Geneva: International Labour Office, 1981.
MLA-referens (8:e uppl.)International Labour Office och S. V. Sethuraman. The Urban Informal Sector in Developing Countries: Employment, Poverty and Environment. International Labour Office, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.