APA-viite (7. p.)

Johns, E., Ahmad, T., Hubbard, R., Jewell, D., & Travis, S. (2003). Combining clinical risk factors and genotype to predict postoperative recurrence of Crohn's disease.

Chicago-viite (17. p.)

Johns, E., T. Ahmad, R. Hubbard, D. Jewell, ja S. Travis. Combining Clinical Risk Factors and Genotype to Predict Postoperative Recurrence of Crohn's Disease. 2003.

MLA-viite (9. p.)

Johns, E., et al. Combining Clinical Risk Factors and Genotype to Predict Postoperative Recurrence of Crohn's Disease. 2003.