Lubis, Adhayani, et al. “The Effectiveness of Cholecalciferol Addition at Improving Psychosis Symptoms in Amphetamine-Type Stimulant (ATS) Users”. Pakistan Journal of Nutrition, vol. 19, no. 2, Jan. 2020, pp. 44–50, https://doi.org/10.3923/pjn.2020.44.50.