J. Villegas-Puyod, S. Sharma, S. Ajah, M. Chaisanrit, and B. Skuldee, “The Role of Teacher Support, Classmate Support, and Self-efficacy in Reducing Speaking Anxiety among University Students Using English as a Foreign Language ”, Hum. Behav. Dev. Soc., vol. 21, no. 3, pp. 59–68, Sep. 2020.