N. Atalo, Y. Suryatinah, A. Ferdina, and S. Siahaan, “The use of vitamin supplements and herbal medicines among members of Elderly Posyandu during the COVID-19 pandemic in North Jakarta ”, AMB, vol. 50, no. 3, pp. 41–50, Sep. 2023, doi: 10.2478/AMB-2023-0029.