Ryan, H. J. D. B. ;. S. S. B. ;. H. J. S. ;. A. F. (1974). Essentials of Geography - Regions and Concepts. John Wiley And Sons.
Chicago Style (17th ed.) CitationRyan, Harm J. De Blij ; Stephen S. Birdsall ; Hans J. Stolle ; Alan F. Essentials of Geography - Regions and Concepts. John Wiley And Sons, 1974.
MLA (8th ed.) CitationRyan, Harm J. De Blij ; Stephen S. Birdsall ; Hans J. Stolle ; Alan F. Essentials of Geography - Regions and Concepts. John Wiley And Sons, 1974.
Warning: These citations may not always be 100% accurate.