APA (7th ed.) Citation

Johnson, S., & Johnson, O. (2011). The History of the Yorubas: From the Earliest Times to the Beginning of the British Protectorate. Cambridge University Press. https://doi.org/10.1017/CBO9780511702617

Chicago Style (17th ed.) Citation

Johnson, Samuel, and Obadiah Johnson. The History of the Yorubas: From the Earliest Times to the Beginning of the British Protectorate. Cambridge: Cambridge University Press, 2011. https://dx.doi.org/10.1017/CBO9780511702617.

MLA (8th ed.) Citation

Johnson, Samuel, and Obadiah Johnson. The History of the Yorubas: From the Earliest Times to the Beginning of the British Protectorate. Cambridge University Press, 2011.