Kwajaffa, B. F., Audu, M. A. and Yamta, H. A. (2009) “Effective Planning And Techniques Of Successful Negotiation And Purchasing In An Organisation”, International Journal of Creativity and Technical Development (IJCTD), 1(1-3), pp. 92–105. Available at: http://icidr.org.ng/index.php/Ijctd/article/view/689 (Accessed: 19 September 2024).