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Mann, K (2007). "An African Family Archive: The Lawsons of Little Popo/Aneho (Togo), 1841-1938". The English Historical Review. CXXII (499): 1438–1439. doi:10.1093/ehr/cem350. ISSN0013-8266.
Curtin, Philip D. (1998). Disease and empire : the health of European troops in the conquest of Africa. Cambridge, U.K.: Cambridge University Press. ISBN0521591694. OCLC39169947.
James, Lawrence (2017-06-06). Empires in the sun : the struggle for the mastery of Africa (First Pegasus books hardcover ed.). New York. ISBN9781681774633. OCLC959869470.{{cite book}}: CS1 maint: location missing publisher (link)