Harahap, C., S. Harahap, C. Lubis, and A. Judin. “Review of Hepatitis B Vaccination in Children of Workers of an Oil & Gas Industry in Lho’seumawe and Lho’sukon, North Aceh”. Paediatrica Indonesiana, Vol. 34, no. 7-8, Dec. 2018, pp. 209-15, doi:10.14238/pi34.7-8.1994.209-15.