Sifton Praed's map of German East Africa.
MLA
Sifton, Praed, and Ltd Company. Sifton Praed's Map of German East Africa. Sifton Praed & Co. Ltd., 1916. https://collections.library.yale.edu/catalog/15532756.
APA, 6th edition
Sifton, P., & Company, L. (1916). Sifton Praed's map of German East Africa. [Maps]. Sifton Praed & Co. Ltd., https://collections.library.yale.edu/catalog/15532756.