1. Avolio, B. J., Walumbwa, F. O., & Weber, T. J. (2009). Leadership: Current theories, research, and future directions. Annual Review of Psychology, 60(1), 421–449. https://doi.org/10.1146/annurev.psych.60.110707.163621
2. Beer, M., & Eisenstat, R. A. (2000). The silent killers of strategy implementation and learning. Sloan Management Review. http://www.nonprofitjourney.org/uploads/8/4/4/9/8449980/_the_silent_killers_of_strategy.pdf
3. Bindra, S., Parameswar, N., & Dhir, S. (2019). Strategic management: The evolution of the field. Strategic Change, 28(6), 469–478. https://doi.org/10.1002/jsc.2299
4. Bonorchis, R., & Burkhardt, P. (2017, September 22). Goldman sees Eskom as biggest risk to South African economy. Bloomberg. https://www.bloomberg.com/news/articles/2017-09-22/goldman-sachs-sees-eskom-as-biggest-risk-to-s-african-economy
5. Bryman, A., Bell, E., Hirschsohn, P., dos Santos, A., du Toit, J., Masenge, A., van Aardt, I., & Wagner, C. (2014). Research methodology: Business and management contexts. Oxford University Press Southern Africa.