APA (7th ed.) Citation

HL, S., & MJ, T. (2018). Bouveret syndrome. QJM : monthly journal of the Association of Physicians, 111(7), 489. https://doi.org/10.1093/qjmed/hcy020

Chicago Style (17th ed.) Citation

HL, Su, and Tsai MJ. "Bouveret Syndrome." QJM : Monthly Journal of the Association of Physicians 111, no. 7 (2018): 489. https://doi.org/10.1093/qjmed/hcy020.

MLA (9th ed.) Citation

HL, Su, and Tsai MJ. "Bouveret Syndrome." QJM : Monthly Journal of the Association of Physicians, vol. 111, no. 7, 2018, p. 489, https://doi.org/10.1093/qjmed/hcy020.