Kijai, J., R. Maidom, and D. Benjamin Loo. “Factors Related to Language Shift among the Tindal Population in Ratau, Kota Belud, Sabah”. Human Behavior, Development and Society, vol. 7, no. 1, Feb. 2019, pp. 4-13, https://so01.tci-thaijo.org/index.php/hbds/article/view/172410.