Great Britain. Office of Commonwealth Relations. (1961). Incorporation of the Northern Cameroons into the Federation of Nigeria: Exchange of letters between the Government of the United Kingdom and the Government of the Federation of Nigeria. H.M.S.O..

Great Britain. Office of Commonwealth Relations. Incorporation of the Northern Cameroons into the Federation of Nigeria: Exchange of Letters Between the Government of the United Kingdom and the Government of the Federation of Nigeria. London: H.M.S.O., 1961.

Great Britain. Office of Commonwealth Relations. Incorporation of the Northern Cameroons into the Federation of Nigeria: Exchange of Letters Between the Government of the United Kingdom and the Government of the Federation of Nigeria. H.M.S.O., 1961.