Scriven, Michael. “A Summative Evaluation of RCT Methodology: & An Alternative Approach to Causal Research”. Journal of MultiDisciplinary Evaluation 5, no. 9 (January 4, 2008): 11–24. Accessed April 24, 2024. https://journals.sfu.ca/jmde/index.php/jmde_1/article/view/160.