APA (7th ed.) Citation

Barr, G., Shale, D., & Jewell, D. (1986). Ulcerative colitis and sarcoidosis. BMJ Publishing Group.

Chicago Style (17th ed.) Citation

Barr, G., D. Shale, and D. Jewell. Ulcerative Colitis and Sarcoidosis. BMJ Publishing Group, 1986.

MLA (9th ed.) Citation

Barr, G., et al. Ulcerative Colitis and Sarcoidosis. BMJ Publishing Group, 1986.