APA (7th ed.) Citation

Hudson, J. C. (1972). Geographical diffusion theory. Department of Geography,Northwestern University.

Chicago Style (17th ed.) Citation

Hudson, John C. Geographical Diffusion Theory. Evanston, Illinois: Department of Geography,Northwestern University, 1972.

MLA (9th ed.) Citation

Hudson, John C. Geographical Diffusion Theory. Department of Geography,Northwestern University, 1972.

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