Citação norma APA

Litwin, A. H., Berg, K. M., Li, X., Hidalgo, J., & Arnsten, J. H. (2011). Rationale and design of a randomized controlled trial of directly observed hepatitis C treatment delivered in methadone clinics. BioMed Central.

Citação norma Chicago

Litwin, Alain H., Karina M. Berg, Xuan Li, Jennifer Hidalgo, e Julia H. Arnsten. Rationale and Design of a Randomized Controlled Trial of Directly Observed Hepatitis C Treatment Delivered in Methadone Clinics. BioMed Central, 2011.

Citação norma MLA

Litwin, Alain H., et al. Rationale and Design of a Randomized Controlled Trial of Directly Observed Hepatitis C Treatment Delivered in Methadone Clinics. BioMed Central, 2011.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.