Amin, M., and A. Sitepu. “Pendekatan Terapi Asthma-COPD Overlap (ACO): [The Approach of Asthma-COPD Overlap Syndrome Treatment]”. Jurnal Respirasi, vol. 3, no. 3, Sept. 2017, pp. 97-105, doi:10.20473/jr.v3-I.3.2017.97-105.