Silpakampises, K., P. Phuttharod, and L. Kumtorn. “Effectiveness of Implementing a Positive Self-Talk Training Program in Diabetics Patients With Depression”. KASEM BUNDIT JOURNAL, vol. 20, no. 1, June 2019, pp. 105-13, https://so04.tci-thaijo.org/index.php/jkbu/article/view/190119.