E. I. Bandiola and C. C. Ambal, “The Incidence Of Hepatitis B Surface Antigen Positive Pregnant Women Admitted and Delivered at Camiguin General Hospital, Mambajao, Camiguin”, jpair, vol. 1, no. 1, pp. 2–9, Nov. 2008, doi: 10.7719/jpair.v1i1.20.