Dyfyniad APA
Narcotics Anonymous. (1987). Narcotics anonymous (5th ed.). World Service Office.
Dyfyniad Arddull Chicago
Narcotics Anonymous. Narcotics Anonymous. 5th ed. Van Nuys, CA, U.S.A: World Service Office, 1987.
Dyfyniad MLA
Narcotics Anonymous. Narcotics Anonymous. 5th ed. World Service Office, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.