1. U.S. Food and Drug Administration Center for Tobacco Products. Public health focus—electronic cigarettes (e-cigarettes). http://www.fda.gov/newsevents/publichealthfocus/ucm172906.htm.
2. National Public Radio. E-cigarettes bring smokers back inside, for now. npr.org/2013/04/27/179490799/e-cigarettes-bring-smokers-back-inside-for-now.
3. Veppo, Inc. Veppo E-Cigarettes at 2013 Billboard Music Awards. veppocig.com/billboard-music-awards/.
4. Internet Movie Database. Demo Reel (Blu E-Cig National TV Commercial). IMDb. imdb.com/video/demo_reel/vi2066392089/.