Dyfyniad APA

(2008). Teens and sleep: Why you need it and how to get enough. Pulsus Group Inc.

Dyfyniad Arddull Chicago

Teens and Sleep: Why You Need It and How to Get Enough. Pulsus Group Inc, 2008.

Dyfyniad MLA

Teens and Sleep: Why You Need It and How to Get Enough. Pulsus Group Inc, 2008.

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