Rowlands, E. C. 1993. Teach Yourself Yoruba. Hodder & Stoughton Ltd. Kent, Great Britain.
Schleicher, Antonia Yetunde Folarin. 1993. Je K�a So Yoruba. Yale University Press. New Haven and London.
Schleicher, Antonia Yetunde Folarin. 1998. Je K�a Ka Yoruba. Yale University Press. New Haven and London.
Soroye, Olatunde M. 1998. YORUBA Without Tears. AraIfa Publishing. Lynwood, California 90262.