Verbi, S. “A Year in God’s Time: Response Shift-Bias and Retrospective Pretest Methodologies in Measuring Spiritual Impact”. Christian Relief, Development, and Advocacy: The Journal of the Accord Network, vol. 4, no. 1, Oct. 2022, pp. 28-36, https://crdajournal.org/index.php/crda/article/view/545.