Mehmood Noor, Sarah, et al. “MANDALA-COLORING AS A THERAPEUTIC INTERVENTION FOR ANXIETY REDUCTION IN UNIVERSITY STUDENTS: Mandala-Coloring”. Pakistan Armed Forces Medical Journal, vol. 67, no. 6, Dec. 2017, pp. 904-07, https://www.pafmj.org/PAFMJ/article/view/1040.