Clearing the air :
how to quit smoking-- and quit for keeps.

APA Citation

National Cancer Institute (U.S.). (1993). Clearing the air: how to quit smoking-- and quit for keeps. Rev. Sept. 1993. [Bethesda, Md.]: National Cancer Institute.

MLA Citation

National Cancer Institute (U.S.). Clearing the Air: How to Quit Smoking-- And Quit for Keeps. Rev. Sept. 1993. [Bethesda, Md.]: National Cancer Institute, 1993.