Ikegbu, Ephraim Ahamefula, and Maduka Enyimba. “Implications of Some Selected Ethical Theories for Environmental Sustainability and Development in Nigeria”. European Journal of Sustainable Development 9, no. 1 (February 1, 2020): 150. Accessed June 16, 2021. https://ecsdev.org/ojs/index.php/ejsd/article/view/973.