Semple, E. C., & Ratzel, F. (1911). Influences of geographic environment: On the basis of Ratzel's system of anthropo-geography. New York: H. Holt and Co..
Chicago Style CitationSemple, Ellen Churchill, and Friedrich Ratzel. Influences of Geographic Environment: On the Basis of Ratzel's System of Anthropo-geography. New York: H. Holt and Co., 1911.
MLA CitationSemple, Ellen Churchill, and Friedrich Ratzel. Influences of Geographic Environment: On the Basis of Ratzel's System of Anthropo-geography. New York: H. Holt and Co., 1911.
Warning: These citations may not always be 100% accurate.