1. Health & Life—Tattoo Takeover: Three in Ten Americans Have Tattoos, and Most Don’t Stop at Just One. (n.d.). Retrieved September 4, 2017, from http://www.theharrispoll.com/health-and-life/Tattoo_Takeover.html
2. Tattoos and tattooing. Part I: History and methodology;K. Sperry,1991
3. College Students With Tattoos and Piercings: Motives, Family Experiences, Personality Factors, and Perception By Others;C. B. Forbes,2001
4. Body piercing and tattoo: awareness of health related risks among 4,277 Italian secondary school adolescents;L. Cegolon,2010
5. Prevalence and characteristics of body piercing and tattooing among high school students;M. Deschesnes