APA (7th ed.) Citation

MA, B., MB, M., & RR, S. (2013). An analysis of online messages about probiotics. BMC gastroenterology, 13, 5. https://doi.org/10.1186/1471-230X-13-5

Chicago Style (17th ed.) Citation

MA, Brinich, Mercer MB, and Sharp RR. "An Analysis of Online Messages About Probiotics." BMC Gastroenterology 13 (2013): 5. https://doi.org/10.1186/1471-230X-13-5.

MLA (9th ed.) Citation

MA, Brinich, et al. "An Analysis of Online Messages About Probiotics." BMC Gastroenterology, vol. 13, 2013, p. 5, https://doi.org/10.1186/1471-230X-13-5.