MLA

Philip, George, and London Geographical Institute Son. Philips' War Map of the Pacific. G. Philip & Son Limited, 1945. https://collections.library.yale.edu/catalog/15249641.

APA, 6th edition

Philip, G., & Son, L. G. I. (1945). Philips' war map of the Pacific. [Maps]. G. Philip & Son Limited, https://collections.library.yale.edu/catalog/15249641.