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