APA (7th ed.) Citation

Pista, A., Oliveira, C., Cunha, M., Paixão, M., Real, O., & Group, C. P. S. (2012). Risk factors for human papilomavirus infection among women in Portugal: The CLEOPATRE Portugal Study.

Chicago Style (17th ed.) Citation

Pista, A., CF Oliveira, MJ Cunha, MT Paixão, O. Real, and CLEOPATRE Portugal Study Group. Risk Factors for Human Papilomavirus Infection Among Women in Portugal: The CLEOPATRE Portugal Study. 2012.

MLA (8th ed.) Citation

Pista, A., et al. Risk Factors for Human Papilomavirus Infection Among Women in Portugal: The CLEOPATRE Portugal Study. 2012.