Dyfyniad APA

(1979). Urban Planing. United States of America by lo.

Dyfyniad Arddull Chicago

Urban Planing. United States of America by lo, 1979.

Dyfyniad MLA

Urban Planing. United States of America by lo, 1979.

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