Cita APA (7a ed.)

Björnsson, E., Simren, M., Olsson, R., & Chapman, R. (2004). Fatigue in patients with primary sclerosing cholangitis.

Cita Chicago Style (17a ed.)

Björnsson, E., M. Simren, R. Olsson, y R. Chapman. Fatigue in Patients with Primary Sclerosing Cholangitis. 2004.

Cita MLA (9a ed.)

Björnsson, E., et al. Fatigue in Patients with Primary Sclerosing Cholangitis. 2004.