Não informado. West African journal of education. University of Ibadan, Institute of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. West African Journal of Education. Ibadan, Nigeria: University of Ibadan, Institute of Education.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. West African Journal of Education. University of Ibadan, Institute of Education.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.