Makori, O. R., and R. K. Njuguna. “Leadership Approaches and Its Influence on Performance of Selected Private Security Firms in Nairobi City County, Nairobi, Kenya”. The International Journal of Humanities & Social Studies, vol. 9, no. 9, Sept. 2021, doi:10.24940/theijhss/2021/v9/i9/HS2109-025.