Citazione Stile APA (7a Edizione)

Björnsson, E., Olsson, R., Bergquist, A., Lindgren, S., Braden, B., Chapman, R., . . . Angulo, P. (2008). The natural history of small-duct primary sclerosing cholangitis.

Citazione stile Chigago Style (17a edizione)

Björnsson, E., R. Olsson, A. Bergquist, S. Lindgren, B. Braden, R. Chapman, K. Boberg, e P. Angulo. The Natural History of Small-duct Primary Sclerosing Cholangitis. 2008.

Citatione MLA (9a ed.)

Björnsson, E., et al. The Natural History of Small-duct Primary Sclerosing Cholangitis. 2008.