Tesalonika, Natasya Cornelia, et al. “Identification of Soil-Transmitted Helminths in Soil of Sheep Farm in Manggis Village, Serbajadi District, Serdang Bedagai Regency”. Sumatera Medical Journal, vol. 6, no. 1, Mar. 2023, pp. 7-10, doi:10.32734/sumej.v6i1.8039.