Zami, Mohammad Sharif. “A Conceptual Framework Outlining Factors Affecting the Acceptance of Earth As a Sustainable Building Material in the United Kingdom”. European Journal of Sustainable Development 9, no. 3 (October 1, 2020): 241. Accessed December 2, 2021. http://ecsdev.org/ojs/index.php/ejsd/article/view/1082.