Dyfyniad APA

(2005). No need to pay if a drug doesn't work? BMJ Publishing Group Ltd.

Dyfyniad Arddull Chicago

No Need to Pay If a Drug Doesn't Work? BMJ Publishing Group Ltd, 2005.

Dyfyniad MLA

No Need to Pay If a Drug Doesn't Work? BMJ Publishing Group Ltd, 2005.

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