APA
New York University I. O. E. A., New York University I. O. E. A., . (1966). Permanent frontier. : .
Chicago
New York University Institute Of Economic Affairs, New York University Institute Of Economic Affairs, . 1966. Permanent frontier. : .
Harvard
New York University I. O. E. A., New York University I. O. E. A., . (1966). Permanent frontier. : .
MLA
New York University Institute Of Economic Affairs, New York University Institute Of Economic Affairs, . Permanent frontier. : . 1966.
