Cite

Northern and southern Nigeria / Comp. in the Geog. Section, Gen. Staff.

MLA

Section, Great Britain. War Office. General Staff. Geographical. Northern and Southern Nigeria / Comp. in the Geog. Section, Gen. Staff. War Office, 1910. https://collections.library.yale.edu/catalog/15533571.

APA, 6th edition

Section, G. B. W. O. G. S. G. (1910). Northern and southern Nigeria / Comp. in the Geog. Section, Gen. Staff. [Maps]. War Office, https://collections.library.yale.edu/catalog/15533571.