Woga, J., and V. Akujuru. “The Place of Environmental Valuation in the Training of Estate Surveyors and Valuers”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 30, no. 3, Nov. 2016, pp. 58-73, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6478.