Cita APA

Kelly, I., Frith, P., Hyman, N., & Jewell, D. (1990). Retinal periphlebitis in ulcerative colitis. BMJ Publishing Group.

Citación estilo Chicago

Kelly, I., P. Frith, N. Hyman, and D. Jewell. Retinal Periphlebitis in Ulcerative Colitis. BMJ Publishing Group, 1990.

Cita MLA

Kelly, I., et al. Retinal Periphlebitis in Ulcerative Colitis. BMJ Publishing Group, 1990.