APA (7th ed.) Citation

Gravningen, K., Furberg, A., Simonsen, G. S., & Wilsgaard, T. (2012). Early sexual behaviour and Chlamydia trachomatis infection – a population based cross-sectional study on gender differences among adolescents in Norway. BioMed Central Ltd.

Chicago Style (17th ed.) Citation

Gravningen, Kirsten, Anne-Sofie Furberg, Gunnar Skov Simonsen, and Tom Wilsgaard. Early Sexual Behaviour and Chlamydia Trachomatis Infection – a Population Based Cross-sectional Study on Gender Differences Among Adolescents in Norway. BioMed Central Ltd, 2012.

MLA (9th ed.) Citation

Gravningen, Kirsten, et al. Early Sexual Behaviour and Chlamydia Trachomatis Infection – a Population Based Cross-sectional Study on Gender Differences Among Adolescents in Norway. BioMed Central Ltd, 2012.