Não informado. West African journal of education. University of Ibadan, Institute of Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. West African Journal of Education. Ibadan, Nigeria: University of Ibadan, Institute of Education.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. West African Journal of Education. University of Ibadan, Institute of Education.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.