Koçak, Duygu. “The Effects of Model Based Missing Data Methods on Guessing Parameter in Case of Ignorable Missing Data”. Pegem Journal of Education and Instruction 8, no. 1 (December 1, 2017): 155–172. Accessed April 28, 2024. https://www.pegegog.net/index.php/pegegog/article/view/pegegog.2018.007.