1. Ali, M. (2003). Issues in Nigerian Economy. Nsukka: A.M.P. Express Publishers Limited.
2. Cortright, J. (2006). Making sense of clusters: Regional competitiveness and economic development. Brookings Institution, Metropolitan Policy Program.
3. Desai, V. (2006): Small Scale Industries and Entrepreneurship, Himalaya Publishing House, Mumbai, pp.288
4. Federal Ministry of Industry (1989). Manufacturing Industries in Nigeria. Lagos, Nigeria.
5. Hassan, M. M., Aleneze, M. S., & Good, Z. R. (2019). Spatial Pattern Analysis of Manufacturing, Industries in Keraniganj, Dhaka, Bangladesh. GeoJournal: 02 Jan, 2019. https://doi.org/10.1007/s10708-018-9961-5.