Yolanda Puri, Ice. “NEGERI ZAMBRUT KHATULISTIWA NEGERI PENGIMPOR”. Jurnal Kesehatan Masyarakat Andalas 8, no. 1 (September 1, 2013): 1. Accessed May 4, 2024. http://jurnal.fkm.unand.ac.id/index.php/jkma/article/view/116.