Não informado. (1970). Smoking and health bulletin. U.S. National Clearinghouse for Smoking and Health.
Lua i Stíl Chicago (17ú heag.)Não informado. Smoking and Health Bulletin. Arlington, Va: U.S. National Clearinghouse for Smoking and Health, 1970.
Lua MLA (8ú heag.)Não informado. Smoking and Health Bulletin. U.S. National Clearinghouse for Smoking and Health, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.