APA-referens

Papola, T. S. (1981). Urban informal sector in a developing economy. Vikas.

Chicago-stil citat

Papola, T. S. Urban Informal Sector in a Developing Economy. Uthar Pradesh: Vikas, 1981.

MLA-referens

Papola, T. S. Urban Informal Sector in a Developing Economy. Vikas, 1981.