Gaya APA

Bengtson, N, A., Royen, W, V. (1953). Fundamentals of Economic Geography, Third Edition . New York: PRENTICE HALL.

Gaya MLA

Bengtson, Nels, A.., Royen, William, Van. "Fundamentals of Economic Geography, Third Edition". New York: PRENTICE HALL, 1953. Text.