Não informado. West African journal of education. University of Ibadan, Institute of Education.
Citação do estilo Chicago (17ª ed.)Não informado. West African Journal of Education. Ibadan, Nigeria: University of Ibadan, Institute of Education.
Citação MLA (8ª ed.)Não informado. West African Journal of Education. University of Ibadan, Institute of Education.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.