APA

National Clearinghouse for Smoking and Health, . (1971). Teenage smoking: national patterns of cigarette smoking, ages 12 through 18, in 1968 and 1970. Rockville, Md: National Clearinghouse for Smoking and Health.

Chicago

National Clearinghouse for Smoking and Health, . 1971. Teenage smoking: national patterns of cigarette smoking, ages 12 through 18, in 1968 and 1970. Rockville, Md: National Clearinghouse for Smoking and Health.

Harvard

National Clearinghouse for Smoking and Health, . (1971). Teenage smoking: national patterns of cigarette smoking, ages 12 through 18, in 1968 and 1970. Rockville, Md: National Clearinghouse for Smoking and Health.

MLA

National Clearinghouse for Smoking and Health, . Teenage smoking: national patterns of cigarette smoking, ages 12 through 18, in 1968 and 1970. Rockville, Md: National Clearinghouse for Smoking and Health. 1971.