APA
Boston J. S., Nigerian Institute of Social and Economic Research, . (1968). The Igala kingdom. Ibadan: Published for the Nigerian Institute of Social and Economic Research [by] Oxford University Press.
Chicago
Boston J S, Nigerian Institute of Social and Economic Research, . 1968. The Igala kingdom. Ibadan: Published for the Nigerian Institute of Social and Economic Research [by] Oxford University Press.
Harvard
Boston J. S., Nigerian Institute of Social and Economic Research, . (1968). The Igala kingdom. Ibadan: Published for the Nigerian Institute of Social and Economic Research [by] Oxford University Press.
MLA
Boston J S, Nigerian Institute of Social and Economic Research, . The Igala kingdom. Ibadan: Published for the Nigerian Institute of Social and Economic Research [by] Oxford University Press. 1968.