Webb, R. (1976). On the statistical mapping of urban poverty and employment. International Bank for Reconstruction and Development.
Chicago-referens (17:e uppl.)Webb, Richard. On the Statistical Mapping of Urban Poverty and Employment. Washington: International Bank for Reconstruction and Development, 1976.
MLA-referens (9:e uppl.)Webb, Richard. On the Statistical Mapping of Urban Poverty and Employment. International Bank for Reconstruction and Development, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.