APA Citation

Cummings, P. H. (1974). Points from Letters: Tar Content of Cigarette Tobacco.

Chicago Style Citation

Cummings, P. H. Points From Letters: Tar Content of Cigarette Tobacco. 1974.

MLA Citation

Cummings, P. H. Points From Letters: Tar Content of Cigarette Tobacco. 1974.

Warning: These citations may not always be 100% accurate.