Dyfyniad APA

Russell, B. (1961). Has Man a Future? Allen & Unwin.

Dyfyniad Arddull Chicago

Russell, Bertrand. Has Man a Future? London: Allen & Unwin, 1961.

Dyfyniad MLA

Russell, Bertrand. Has Man a Future? Allen & Unwin, 1961.

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