Frey, W. H. Three Americas: The rising significance of regions. Journal of the American Planning Association.
Style de citation Chicago (17e éd.)Frey, William H. "Three Americas: The Rising Significance of Regions." Journal of the American Planning Association .
Style de citation MLA (9e éd.)Frey, William H. "Three Americas: The Rising Significance of Regions." Journal of the American Planning Association, .
Attention : ces citations peuvent ne pas être correctes à 100%.