Hartshorn, T. A., & Alexander, J. W. (1987). Economic geography (3rd ed.). Prentice Hall.
Chicago-čujuhus (17. p.)Hartshorn, Truman A., juo John W. Alexander. Economic Geography. 3rd ed. Englewood Cliffs: Prentice Hall, 1987.
MLA-čujuhus (9. p.)Hartshorn, Truman A., juo John W. Alexander. Economic Geography. 3rd ed. Prentice Hall, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.