Não informado. (1970). Smoking and health bulletin. U.S. National Clearinghouse for Smoking and Health.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Smoking and Health Bulletin. Arlington, Va: U.S. National Clearinghouse for Smoking and Health, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Smoking and Health Bulletin. U.S. National Clearinghouse for Smoking and Health, 1970.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.