Παραπομπή APA

Ward, R., & Hoffman, L. (1961). Readings in economic geography. Holt Riane Hart.

Παραπομπή Chicago Style

Ward, R.J, και L.A Hoffman. Readings in Economic Geography. New York: Holt Riane Hart, 1961.

Παραπομπή MLA

Ward, R.J, και L.A Hoffman. Readings in Economic Geography. Holt Riane Hart, 1961.