«Evaluation of Substance abuse among in school and out of school youth in Sokoto, northwestern Nigeria», AJBR, т. 23, вып. 3, сс. 361–365, сен. 2020, просмотрено: 10 апрель 2026 г. [онлайн]. доступно на: https://www.ojshostng.com/index.php/ajbr/article/view/90