APA (7th ed.) Zitazioa

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.

Chicago Style (17th ed.) Zitazioa

World Health Organization, Tobacco Free Initiative (World Health Organization), eta Inc ebrary. Protection from Exposure to Second-hand Tobacco Smoke: Policy Recommendations. Geneva, Switzerland: World Health Organization, 2007.

MLA (9th ed.) Zitazioa

World Health Organization, et al. Protection from Exposure to Second-hand Tobacco Smoke: Policy Recommendations. World Health Organization, 2007.