Dyfyniad APA

Goldsmith, W. W., & Derian, M. J. (1979). Is there an urban policy? PURS.

Dyfyniad Arddull Chicago

Goldsmith, William W., and Michael J. Derian. Is There an Urban Policy? Ithaca, N.Y.: PURS, 1979.

Dyfyniad MLA

Goldsmith, William W., and Michael J. Derian. Is There an Urban Policy? PURS, 1979.

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