Porter, V., & Mason, I. L. (2002). Mason’s World Dictionary of Livestock Breeds, Types and Varieties (5th ed.). Wallingford, Oxfordshire, UK: CABI Publishing.
Rege, J. E. O., Aboagye, G. S., & Tawah, C. L. (n.d.). Shorthorn cattle of West and Central Africa I. Origin, distribution, classification and population statistics. The Food and Agriculture Organization of the United Nations. https://www.fao.org/4/T1300T/t1300T04.htm