Cita APA (7th ed.)

Hartshorn, T. A., & Alexander, J. W. (1987). Economic geography (3rd ed.). Prentice Hall.

Cita Chicago (17th ed.)

Hartshorn, Truman A., i John W. Alexander. Economic Geography. 3rd ed. Englewood Cliffs: Prentice Hall, 1987.

Cita MLA (9th ed.)

Hartshorn, Truman A., i John W. Alexander. Economic Geography. 3rd ed. Prentice Hall, 1987.