Devas, C. S. (1906). The key to the world's progress, being an essay on historical logic. Longmans, Green and Co..
Chicago Style (17. basım) AtıfDevas, Charles Stanton. The Key to the World's Progress, Being an Essay on Historical Logic. London: Longmans, Green and Co., 1906.
MLA (8th ed.) AtıfDevas, Charles Stanton. The Key to the World's Progress, Being an Essay on Historical Logic. Longmans, Green and Co., 1906.
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