Uzochukwu, O., O. Chinonso, and D. Martha. “Urban Waste Disposal Management and Service Delivery in Port Harcourt Metropolis of Nigeria”. Journal of Research in Business, Economics and Management, Vol. 6, no. 1, May 2016, pp. 804-10, http://scitecresearch.com/journals/index.php/jrbem/article/view/742.