Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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