Παραπομπή APA

Van Royen, W. (1964). Fundamentals of economic geography: An introduction to the study of resources (5th ed.). Englewood Cliffs, N.J: Prentice-Hall.

Παραπομπή Chicago Style

Van Royen, William. Fundamentals of Economic Geography: An Introduction to the Study of Resources. 5th ed. Englewood Cliffs, N.J: Prentice-Hall, 1964.

Παραπομπή MLA

Van Royen, William. Fundamentals of Economic Geography: An Introduction to the Study of Resources. 5th ed. Englewood Cliffs, N.J: Prentice-Hall, 1964.

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