Dyfyniad APA

Newland, K. (1980). City limits: Emerging constraints on urban growth. Worldwatch Institute.

Dyfyniad Arddull Chicago

Newland, Kathleen. City Limits: Emerging Constraints on Urban Growth. [Washington, D.C.]: Worldwatch Institute, 1980.

Dyfyniad MLA

Newland, Kathleen. City Limits: Emerging Constraints on Urban Growth. Worldwatch Institute, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.