1. United Nations Department of Economic and Social Affairs (UN DESA), 2015) International Migrant Stock: Revision. United Nations, New York. Available from: www.un.org/en/development/desa/population/migration/data/estimates2/estimates15.shtml
2. United Nations Department of Economic and Social Affairs. (2013a). World population Prospects: the 2012 revision. New York, Population division, united nations (UN) online]. [Accessed 8 November 2015].Available at:http://esa.un.org/unpd/wup/http://esa.un.org/wpp>/
3. DFID. Migration and pro-poor policy in sub-Saharan Africa. Policy Briefing prepared by the Sussex Development Research Centre on Migration. 2004
4. Awumbila M, Kofi Tehe J, Litchfield J, Boakye-Yiadom L, Deshingkar P, Quartey P. Are Migrant Households Better off Than Non-migrant Households? Evidence from Ghana. Ghana: Migration Out of Poverty; 2015
5. Mitullah W. A Review of Street Trade in Africa. Cambridge: WIEGO; 2004