GREGORY, S. (1968). Statirical methods and the geographer. Longmans.
Chicago-čujuhus (17. p.)GREGORY, Stanley. Statirical Methods and the Geographer. London: Longmans, 1968.
MLA-čujuhus (9. p.)GREGORY, Stanley. Statirical Methods and the Geographer. Longmans, 1968.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.