Gaya APA

Bengtson, N, A., Royen, W, V. (1960). Fundamentals Of Economic Geography . United State of America: Prentice-Hall, INC..

Gaya MLA

Bengtson, Nels, A.., Royen, William, Van. "Fundamentals Of Economic Geography". United State of America: Prentice-Hall, INC., 1960. Text.