APA
Nigerian Institute of Social and Economics Research (7th : Dec1- 196 : Ibadan Ibadan), . (1960). West Africa Institute of social and economic research. U.S.A: Nigerian institute of social and economic research Pub.
Chicago
Nigerian Institute of Social and Economics Research (7th : Dec1- 196 : Ibadan Ibadan), . 1960. West Africa Institute of social and economic research. U.S.A: Nigerian institute of social and economic research Pub.
Harvard
Nigerian Institute of Social and Economics Research (7th : Dec1- 196 : Ibadan Ibadan), . (1960). West Africa Institute of social and economic research. U.S.A: Nigerian institute of social and economic research Pub.
MLA
Nigerian Institute of Social and Economics Research (7th : Dec1- 196 : Ibadan Ibadan), . West Africa Institute of social and economic research. U.S.A: Nigerian institute of social and economic research Pub. 1960.
