Yakum, Martin Ndinakie, Atem Bethel Ajong, Atanga Desmond Funwie, and Zahir Shah. 2023. “The Validity and Reliability of Parent’s Recall for Routine Immunization in Cameroon”. Archives of Clinical and Biomedical Research 7 (6):560-66. https://fortunejournals.org/ojs/index.php/acbr/article/view/15040.