«Maternal, newborn and child health (MNCH) services utilization: A comparative case study of tertiary and primary health care facilities in Cross River State»., AJBR, вип. 24, вип. 1, с. 81–92, Січ 2021, дата звернення: 01, Травень 2026. [Online]. доступний у: https://ojshostng.com/index.php/ajbr/article/view/1154