Brakman, S., Garretsen, H., & Schramm, M. (2002). New Economic Geography in Germany: Testing the Helpman-Hanson Model.
Chicago-Zitierstil (17. Ausg.)Brakman, Steven, Harry Garretsen, und Marc Schramm. New Economic Geography in Germany: Testing the Helpman-Hanson Model. Hamburg, 2002.
MLA-Zitierstil (8. Ausg.)Brakman, Steven, et al. New Economic Geography in Germany: Testing the Helpman-Hanson Model. 2002.
警告：這些引文格式不一定是100％准確.