Suraphee, Sujitta, Chancharoen Raksmanee, Jaruchat Busaba, Chanchai Chaisorn, and Wilaiwan Nakornthai. “A Comparison of Estimation Methods for Missing Data in Multiple Linear Regression With Two Independent Variables”. Thailand Statistician 4 (May 28, 2015): 13–26. Accessed May 4, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34352.