APA (7th ed.) Citation

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.) Citation

Ryan, 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.) Citation

Ryan, Harm J. De Blij ; Stephen S. Birdsall ; Hans J. Stolle ; Alan F. Essentials of Geography - Regions and Concepts. John Wiley And Sons, 1974.