Cita APA (7th ed.)

ROYEN, W. V., & BENGTSON, N. A. (1964). Fundamentals of economic geography: An introduction tothe study of resources. Prentice-Hall.

Cita Chicago (17th ed.)

ROYEN, William Van, i Nels A. BENGTSON. Fundamentals of Economic Geography: An Introduction Tothe Study of Resources. Englewood Cliffs: Prentice-Hall, 1964.

Cita MLA (9th ed.)

ROYEN, William Van, i Nels A. BENGTSON. Fundamentals of Economic Geography: An Introduction Tothe Study of Resources. Prentice-Hall, 1964.