Dyfyniad APA
BERRIDGE, V. (1999). HISTORIES OF HARM REDUCTION: ILLICIT DRUGS, TOBACCO, AND NICOTINE.
Dyfyniad Arddull Chicago
BERRIDGE, V. HISTORIES OF HARM REDUCTION: ILLICIT DRUGS, TOBACCO, AND NICOTINE. 1999.
Dyfyniad MLA
BERRIDGE, V. HISTORIES OF HARM REDUCTION: ILLICIT DRUGS, TOBACCO, AND NICOTINE. 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.