Ajayi, J.F.Ade: “Political organizations in West African towns in the nineteenth century: The Lagos example." Urbanization in African Social Change, Edinburgh, 1963.
2.
Buchanan, Keith: "The northern region of Nigeria: The geographic background of its political duality." The Geographic Review, 1956, 43, 451-473.
3.
Dry, E.A.: "The social development of the Hausa child." Proceedings of the III International West African Conference, Lagos, 1956, 158-63.
4.
Erikson, E.H.: Childhood and Society, New York, 1950 .
5.
Erikson, E.H.: "The problem of ego identity." Journal American Psychoanalytic Association, 1956, 4.
6.
Forde, Daryll and Karberry, P.M.: West African Kingdoms in the Nineteenth Century. New York , 1967.
7.
Forde, Daryll and Karberry, P.M.: "The influence of Islam on a Sudanese religion." Monographs of the American Ethnological Society, 1946, 10.
8.
Greenberg, Joseph H.: "Islam and clan organization among the Hausa." Southwest Journal of Anthropology, 1946, 3, 193-211.
9.
Greenberg, Joseph H.: "Some aspects of Negro-Mohammedan culture contact among the Hausa." American Anthropologist, 1946, n.s., 43, 51-61.
10.
Hassan, Alhaji and Mallam Shuaibu Na'ibi : A Chronicle of A buja. Ibadan , 1952.
11.
Hodgkin, Thomas (ed.) : Nigerian Perspectives—An Historical Anthology. London, 1960.
12.
Hogben, S.J. and Kirk-Greene, A.H.M. : The Emirates of Northern Nigeria. London, 1966.
13.
Johnston, H.A.S.: The Fulani Empire of Sokoto. London, 1967.
14.
Kardiner, Abram and Preble, Edward : They Studied Man. Cleveland, 1961.
15.
Kuper, Leo and Smith, M. G. (eds.): Pluralism in Africa. Los Angeles , 1969.
16.
Opler, M.K.: "Culture and child-rearing." Modern Perspectives in International Child Psychiatry, J. G. Howells (ed). Edinburgh-London, 1969.
17.
Smith, M.F.: Baba of Karo: A Woman of the Muslim Hausa. New York, 1955.
18.
Smith, M.G.: Government in Zazzau, 1800-1950. London, 1960.
