Mpofu, T., and S. Chigwendeb. “Factors Influencing Marketing Planning And Implementation In Zimbabwean SMEs”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 12, no. 1, Oct. 2013, pp. 82-92, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/1128.