Não informado. (1970). Smoking and health bulletin. U.S. National Clearinghouse for Smoking and Health.
Style de citation Chicago (17e éd.)Não informado. Smoking and Health Bulletin. Arlington, Va: U.S. National Clearinghouse for Smoking and Health, 1970.
Style de citation MLA (8e éd.)Não informado. Smoking and Health Bulletin. U.S. National Clearinghouse for Smoking and Health, 1970.
Attention : ces citations peuvent ne pas être correctes à 100%.