Dyfyniad APA

NCADD Washington Report. National Council on Alcoholism & Drug Dependence.

Dyfyniad Arddull Chicago

NCADD Washington Report. National Council on Alcoholism & Drug Dependence.

Dyfyniad MLA

NCADD Washington Report. National Council on Alcoholism & Drug Dependence.

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