Hull, O. (1968). A geography of production. Macmillan.
Chicago-čujuhus (17. p.)Hull, Oswald. A Geography of Production. London: Macmillan, 1968.
MLA-čujuhus (9. p.)Hull, Oswald. A Geography of Production. Macmillan, 1968.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.