Dyfyniad APA

Alcoholism & Drug Abuse Weekly. John Wiley & Sons, Inc.

Dyfyniad Arddull Chicago

Alcoholism & Drug Abuse Weekly. John Wiley & Sons, Inc.

Dyfyniad MLA

Alcoholism & Drug Abuse Weekly. John Wiley & Sons, Inc.

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