Candra, T. J., Widuri, S., & Samsulhadi, W. (2021). Kegiatan Donor Darah di Kecamatan Jambangan Kota Surabaya Tahun 2018. Journal of Community Engagement in Health, 4(2), 481–488. https://doi.org/10.30994/jceh.v4i2.273