MLA

Section, Great Britain. War Office. General Staff. Topographical. Sketch Map of Zululand to Illustrate Handbook, 1906 / Topographical Section, General Staff, War Office. War Office, 1908. https://collections.library.yale.edu/catalog/15827274.

APA, 6th edition

Section, G. B. W. O. G. S. T. (1908). Sketch map of Zululand to illustrate Handbook, 1906 / Topographical Section, General Staff, War Office. [Maps]. War Office, https://collections.library.yale.edu/catalog/15827274.