RJ, H., D, H., D, C., MJ, V., & LR, S. (2001). Attitudes toward smoking and smoking behaviors of patients with Crohn's disease. The American journal of gastroenterology, 96(6), 1849. https://doi.org/10.1111/j.1572-0241.2001.03882.x
Chicago Style (17th ed.) CitationRJ, Hilsden, Hodgins D, Czechowsky D, Verhoef MJ, and Sutherland LR. "Attitudes Toward Smoking and Smoking Behaviors of Patients with Crohn's Disease." The American Journal of Gastroenterology 96, no. 6 (2001): 1849. https://doi.org/10.1111/j.1572-0241.2001.03882.x.
MLA (9th ed.) CitationRJ, Hilsden, et al. "Attitudes Toward Smoking and Smoking Behaviors of Patients with Crohn's Disease." The American Journal of Gastroenterology, vol. 96, no. 6, 2001, p. 1849, https://doi.org/10.1111/j.1572-0241.2001.03882.x.