West, W. M. (1915). The modern world, from Charlemagne to the present time: With a preliminary survey of ancient progress. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)West, Willis M. The Modern World, from Charlemagne to the Present Time: With a Preliminary Survey of Ancient Progress. Boston ; New York [etc.]: Allyn and Bacon, 1915.
Lua MLA (8ú heag.)West, Willis M. The Modern World, from Charlemagne to the Present Time: With a Preliminary Survey of Ancient Progress. Allyn and Bacon, 1915.
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