«Hearing Assessment of Primary School Pupils in Ibadan North Local Government Area of Oyo State, Nigeria », AJBR, bd. 23, nr. Special Edition 1, s. 71–74, jul. 2020, åpnet: 17. mai 2026. [Online]. Tilgjengelig på: https://ojshostng.com/index.php/ajbr/article/view/366