Dyfyniad APA

Clarke, R., & Hindley, G. (1975). Challenge of the primitives. Jonathan Cape.

Dyfyniad Arddull Chicago

Clarke, Robin, and Geoffrey Hindley. Challenge of the Primitives. London: Jonathan Cape, 1975.

Dyfyniad MLA

Clarke, Robin, and Geoffrey Hindley. Challenge of the Primitives. Jonathan Cape, 1975.

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