MADUEKE, U. O.; CASMIR, N. E. DIFFERENTIAL ITEM FUNCTIONING OF WAEC SENIOR SECONDARY CERTIFICATE EXAMINATION BIOLOGY MULTIPLE CHOICE ITEMS . British International Journal of Education and Social Sciences, [S. l.], v. 9, n. 6, p. 31–48, 2022. Disponível em: https://cirdjournals.com/index.php/bijess/article/view/752. Acesso em: 9 may. 2026.