Ma. Linda Q. Dumlao, Rebecca N. Rios, and Gemma Agnes R. Supnet. “Utilization of Family Planning Methods: The Case of Tingguians and Llocanos”. The Vector: International Journal of Emerging Science, Technology and Management (IJESTM), vol. 21, no. 1, Dec. 2012, doi:10.69566/ijestm.v21i1.253.