Faisal, T. I., N. Khaira, N. Veri, M. Magfirah, D. Dewita, A. Alchalidi, and Y. Sari. “The Effect of Walking Exercise and Consumption of Steeping Chamomile Flowers (Matricaria Recutita) on Depression in the Elderly in Langsa City”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. B, July 2021, pp. 626-31, doi:10.3889/oamjms.2021.6260.