Zipf, G. K. (1965). Human behavior and the principle of least effort: An introduction to human ecology. New York: Hafner.
Παραπομπή Chicago StyleZipf, George Kingsley. Human Behavior and the Principle of Least Effort: An Introduction to Human Ecology. New York: Hafner, 1965.
Παραπομπή MLAZipf, George Kingsley. Human Behavior and the Principle of Least Effort: An Introduction to Human Ecology. New York: Hafner, 1965.
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