APA Citatie

DiFranza, J., & Coleman, M. (2001). Sources of tobacco for youths in communities with strong enforcement of youth access laws. BMJ Group.

Chicago Style citaat

DiFranza, J., en M. Coleman. Sources of Tobacco for Youths in Communities With Strong Enforcement of Youth Access Laws. BMJ Group, 2001.

MLA citatie

DiFranza, J., en M. Coleman. Sources of Tobacco for Youths in Communities With Strong Enforcement of Youth Access Laws. BMJ Group, 2001.

Let op: Deze citaties zijn niet altijd 100% accuraat.