Cite

Africa 1:1,000,000. Liberia.

MLA

Section, Great Britain. War Office. General Staff. Topographical. Africa 1:1,000,000. Liberia. Topographical Section, General Staff, 1905. https://collections.library.yale.edu/catalog/15533580.

APA, 6th edition

Section, G. B. W. O. G. S. T. (1905). Africa 1:1,000,000. Liberia. [Maps]. Topographical Section, General Staff, https://collections.library.yale.edu/catalog/15533580.