APA (7th ed.) Citation

Boberg, K., Chapman, R., Hirschfield, G., Lohse, A., Manns, M., & Schrumpf, E. (2011). Overlap syndromes: The International Autoimmune Hepatitis Group (IAIHG) position statement on a controversial issue.

Chicago Style (17th ed.) Citation

Boberg, K., R. Chapman, G. Hirschfield, A. Lohse, M. Manns, and E. Schrumpf. Overlap Syndromes: The International Autoimmune Hepatitis Group (IAIHG) Position Statement on a Controversial Issue. 2011.

MLA (9th ed.) Citation

Boberg, K., et al. Overlap Syndromes: The International Autoimmune Hepatitis Group (IAIHG) Position Statement on a Controversial Issue. 2011.