Saragih, P., V. . Eskana Sihombing, and . I. . Boni Yolanda Pardede. “Factors That Cause the Increase of Pneumonia in Indonesia”. AMCA Journal of Community Development, vol. 2, no. 1, Jan. 2022, pp. 31-33, doi:10.51773/ajcd.v2i1.116.