Citace podle APA (7th ed.)

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

Citace podle Chicago (17th ed.)

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

Citace podle MLA (9th ed.)

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

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