1. Kim JB, Choi YJ. Public oral health science. Seoul : KMS. 1998:34.
2. Kim JB, Choi YJ, Moon HS, Kim JB, Kim DK, Lee YS, et al. Public oral health. 4th ed. Seoul : KMS. 2004:2-3.
3. Lee HS, Lee KH, Kim SN. A study of dental health behavior in Chollabuk Do Republic of Korea. J Korean Acad Dent Health. 1993 ; 17 : 124-42.
4. Toothbrushing, flossing, and dental visits in relation to socioeconomic characteristics of white American families
5. Lee SM. A study on some college student’s awareness of oral health and relevant influential factors. J Korean Acad Dent Hyg Educ. 2007 ; 7 : 41-51.