A. P. Tarigan, F. R. Ananda, P. Pandia, T. Susilo, M. Maryaningsih, and A. Anggriani, “The Impact of Short-term Combination of Limb Training and Pursed-lip Breathing in Chronic Obstructive Pulmonary Disease”, Open Access Maced J Med Sci, vol. 8, no. B, pp. 479–483, May 2020.