International Labour Office & Sethuraman, S. V. (1981). The urban informal sector in developing countries: Employment, poverty and environment. International Labour Office.
芝加哥风格引文International Labour Office 与 S. V. Sethuraman. The Urban Informal Sector in Developing Countries: Employment, Poverty and Environment. Geneva: International Labour Office, 1981.
MLA引文International Labour Office 与 S. V. Sethuraman. The Urban Informal Sector in Developing Countries: Employment, Poverty and Environment. International Labour Office, 1981.
警告：这些引文格式不一定是100％准确.