Dyfyniad APA
World Health Organization, Tobacco Free Initiative (World Health Organization), & ebrary, Inc. (2007). Protection from exposure to second-hand tobacco smoke: Policy recommendations. World Health Organization.
Dyfyniad Arddull Chicago
World Health Organization, Tobacco Free Initiative (World Health Organization), and Inc ebrary. Protection from Exposure to Second-hand Tobacco Smoke: Policy Recommendations. Geneva, Switzerland: World Health Organization, 2007.
Dyfyniad MLA
World Health Organization, et al. Protection from Exposure to Second-hand Tobacco Smoke: Policy Recommendations. World Health Organization, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.