Hartshorn, T. A. (2000). Economic Geography (3rd ed.). Pentice Hall.
Cita Chicago (17th ed.)Hartshorn, Truman A. Economic Geography. 3rd ed. New Delhi: Pentice Hall, 2000.
Cita MLA (9th ed.)Hartshorn, Truman A. Economic Geography. 3rd ed. Pentice Hall, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.