Chanadda Petchprayoon ช. เ., Numchai Supparerkchaisakul น. ศ., and ภัทราวิวัฒน์ ก., “Smartphone Addiction of Students: A Scale Development in the Context of Undergraduate Students in Bangkok”, Journaldtc, vol. 11, no. 3, pp. 325–340, Apr. 2018.