APA (7th ed.) Citation

Semple, E. C. Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography.

Chicago Style (17th ed.) Citation

Semple, Ellen Churchill. Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography.

MLA (9th ed.) Citation

Semple, Ellen Churchill. Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography.

Warning: These citations may not always be 100% accurate.