APA (7th ed.) Citation

Fifield, R. H., & Pearcy, G. E. (1944). Geopolitics in principle and practice. Ginn.

Chicago Style (17th ed.) Citation

Fifield, Russell Hunt, and George Etzel Pearcy. Geopolitics in Principle and Practice. Boston: Ginn, 1944.

MLA (9th ed.) Citation

Fifield, Russell Hunt, and George Etzel Pearcy. Geopolitics in Principle and Practice. Ginn, 1944.