Rada, U. (2012). The Flow of History: Europe's rivers long served as symbols of the continent's frontiers. Topos.
Chicago-Zitierstil (17. Ausg.)Rada, Uwe. "The Flow of History: Europe's Rivers Long Served as Symbols of the Continent's Frontiers." Topos 2012.
MLA-Zitierstil (8. Ausg.)Rada, Uwe. "The Flow of History: Europe's Rivers Long Served as Symbols of the Continent's Frontiers." Topos, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.