APA (7e ed.) Bronvermelding

Frey, W. H. Three Americas: The rising significance of regions. Journal of the American Planning Association.

Chicago (17e ed.) Bronvermelding

Frey, William H. "Three Americas: The Rising Significance of Regions." Journal of the American Planning Association .

MLA (9e ed.) Bronvermelding

Frey, William H. "Three Americas: The Rising Significance of Regions." Journal of the American Planning Association, .

Let op: Deze citaties zijn niet altijd 100% accuraat.