Tshering, T., and U. Sanpatchayapong. “Peer Assessment on Grade Eight Students’ Descriptive Essay Writing at a Lower Secondary School in Bhutan”. Journal of Roi Et Rajabhat University, vol. 10, no. 2, Dec. 2016, pp. 1-11, https://so03.tci-thaijo.org/index.php/reru/article/view/176274.