Knowles, R. (1981). Economic and Social Geography (Fourth Edition). ELSEVIER.
Čikaški stil citiranja (17. izdanje)Knowles, R. Economic and Social Geography (Fourth Edition). ELSEVIER, 1981.
MLA način citiranja (8. izdanje)Knowles, R. Economic and Social Geography (Fourth Edition). ELSEVIER, 1981.
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