[1]
E. S. Dasopang, T. . Julia Sari, W. . Muliani, F. . Hasanah, D. . Natalia Siahaan, and S. . Handayani Lubis, “Willingness To Pay And Ability To Pay Child Follow-Up Immunization In Medan City”, IJSTM, vol. 5, no. 1, pp. 74–81, Jan. 2024.