Garrison, W. L. (1967). Quantitative geography. Dept. of Geography of Northwestern University.
Chicago-čujuhus (17. p.)Garrison, William Louis. Quantitative Geography. Evanston: Dept. of Geography of Northwestern University, 1967.
MLA-čujuhus (9. p.)Garrison, William Louis. Quantitative Geography. Dept. of Geography of Northwestern University, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.