Não informado. (1970). Smoking and health bulletin. U.S. National Clearinghouse for Smoking and Health.
Citação do estilo Chicago (17ª ed.)Não informado. Smoking and Health Bulletin. Arlington, Va: U.S. National Clearinghouse for Smoking and Health, 1970.
Citação MLA (8ª ed.)Não informado. Smoking and Health Bulletin. U.S. National Clearinghouse for Smoking and Health, 1970.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.