Munzara, A. T., and R. Sunge. “Human Capital Investment Decisions: A Logit Model of Willingness to Attain Professional Teaching Qualifications by Uncertified Graduate Teachers in Harare Province, Zimbabwe”. The International Journal of Humanities & Social Studies, vol. 3, no. 6, June 2015, https://internationaljournalcorner.com/index.php/theijhss/article/view/140085.