Blum, A. (1985). Zentrale-Orte-Theorie. IRB-Verl.
Chicago Style (17th ed.) CitationBlum, Askan. Zentrale-Orte-Theorie. Stuttgart: IRB-Verl, 1985.
MLA (9th ed.) CitationBlum, Askan. Zentrale-Orte-Theorie. IRB-Verl, 1985.
Warning: These citations may not always be 100% accurate.