Vestabilivy, E. and Prihatini, F. 2020. Health Service Problems in Umrah Congregations: Evi Vestabilivy, Fitria Prihatini. Jurnal Persada Husada Indonesia. 7, 27 (Oct. 2020), 46–53. DOI:https://doi.org/10.56014/jphi.v7i27.307.