APA (7th ed.) Citation

A, I., B, R., & K, F. (2009). How to handle stress and look after your mental health. BMJ (Clinical research ed.), 338, b1368. https://doi.org/10.1136/bmj.b1368

Chicago Style (17th ed.) Citation

A, Iversen, Rushforth B, and Forrest K. "How to Handle Stress and Look After Your Mental Health." BMJ (Clinical Research Ed.) 338 (2009): b1368. https://doi.org/10.1136/bmj.b1368.

MLA (9th ed.) Citation

A, Iversen, et al. "How to Handle Stress and Look After Your Mental Health." BMJ (Clinical Research Ed.), vol. 338, 2009, p. b1368, https://doi.org/10.1136/bmj.b1368.