1. Adeoti, E. O., & Imuoh, U. A. (2016). The contribution of Dr. Oguntola Odunbaku Sapara Williams to colonial medical service in Lagos. Journal of Humanities and Social Science, 21(4), 50–54.
2. Bascom, W. (1969). The Yoruba of southwestern Nigeria. New York: Holt, Rinehart and Winston.
3. Eyo, E. (1976). Igbo’Laja, Owo. West African Journal of Archaeology, 6, 37–58.
4. Holloway, J. E. (2005). What Africa has given America: African continuities in the North American diaspora. In J. E. Holloway (Ed.), Africanisms in American culture (pp. 53–63). Bloomington: Indiana University Press.
5. Horton, R. (1992). The economy of Ife, c. A.D. 900–c. A.D. 1700. In I. A. Akinjogbin (Ed.), The cradle of a race: Ife from the beginning to 1980 (pp. 122–147). Sunray: Port Harcourt.