Buhari, M. (2020). Speeches delivered at 43rd Convocation Ceremony. Obafemi Awolowo University Press.
Čikaški stil citiranja (17. izdanje)Buhari, Muhammadu. Speeches Delivered at 43rd Convocation Ceremony. Obafemi Awolowo University Press, 2020.
MLA način citiranja (9. izdanje)Buhari, Muhammadu. Speeches Delivered at 43rd Convocation Ceremony. Obafemi Awolowo University Press, 2020.
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