Cite

Africa 1:1 000 000. Nyasaland Protectorate [cartographic material].

MLA

Section, Great Britain. War Office. General Staff. Topographical. Africa 1:1 000 000. Nyasaland Protectorate [Cartographic Material]. W. & A.K. Johnson, Limited, 0AD. https://collections.library.yale.edu/catalog/15827268.

APA, 6th edition

Section, G. B. W. O. G. S. T. (0 C.E.). Africa 1:1 000 000. Nyasaland Protectorate [cartographic material]. [Maps]. W. & A.K. Johnson, Limited, https://collections.library.yale.edu/catalog/15827268.