Isard, W. (1975). Introduction to regional science. Prentice-Hall.
Chicago-čujuhus (17. p.)Isard, Walter. Introduction to Regional Science. .Englewood Cliffs, N.J: Prentice-Hall, 1975.
MLA-čujuhus (9. p.)Isard, Walter. Introduction to Regional Science. Prentice-Hall, 1975.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.