Dyfyniad APA

Russell, B. (1964). The conquest of happiness (4th.). Unwin books.

Dyfyniad Arddull Chicago

Russell, Bertrand. The Conquest of Happiness. 4th. London: Unwin books, 1964.

Dyfyniad MLA

Russell, Bertrand. The Conquest of Happiness. 4th. Unwin books, 1964.

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