Dyfyniad APA

Lockley, S. W. (2012). Sleep: A Very Short Introduction (1st.). Oxford.

Dyfyniad Arddull Chicago

Lockley, Steven W. Sleep: A Very Short Introduction. 1st. Oxford, 2012.

Dyfyniad MLA

Lockley, Steven W. Sleep: A Very Short Introduction. 1st. Oxford, 2012.

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