Cita APA (7a ed.)

Ireland, A., Mason, C., & Jewell, D. (1988). Controlled trial comparing olsalazine and sulphasalazine for the maintenance treatment of ulcerative colitis.

Cita Chicago Style (17a ed.)

Ireland, A., C. Mason, y D. Jewell. Controlled Trial Comparing Olsalazine and Sulphasalazine for the Maintenance Treatment of Ulcerative Colitis. 1988.

Cita MLA (9a ed.)

Ireland, A., et al. Controlled Trial Comparing Olsalazine and Sulphasalazine for the Maintenance Treatment of Ulcerative Colitis. 1988.