Cita APA

Semple, E. C. (1968). Influences of geographic environment on the basis of Ratzel's system of anthropo-geography. Russell & Russell.

Chicago Edition Citation

Semple, Ellen Churchill. Influences of Geographic Environment on the Basis of Ratzel's System of Anthropo-geography. New York: Russell & Russell, 1968.

Cita MLA

Semple, Ellen Churchill. Influences of Geographic Environment on the Basis of Ratzel's System of Anthropo-geography. Russell & Russell, 1968.