APA (7. basım) Alıntı

Okigbo, P. N. C. (1989). National development planning in Nigeria, 1900-1992. J. Curry ; Heinemann ; Fourth Dimension.

Chicago Style (17. basım) Atıf

Okigbo, P. N. C. National Development Planning in Nigeria, 1900-1992. London : Portsmouth, N.H : Enugu [Nigeria]: J. Curry ; Heinemann ; Fourth Dimension, 1989.

MLA (8th ed.) Atıf

Okigbo, P. N. C. National Development Planning in Nigeria, 1900-1992. J. Curry ; Heinemann ; Fourth Dimension, 1989.