Cita APA (7a ed.)

Reeping, P. M., Branas, C. C., Galea, S., Wiebe, D. J., Kalesan, B., & Cerda, M. (2019). State gun laws, gun ownership, and mass shootings in the US: Cross sectional time series. The BMJ, 364, 1542. doi:10.1136/bmj.l542

Cita Chicago Style (17a ed.)

Reeping, Paul M., Charles C. Branas, Sandro Galea, Douglas J. Wiebe, Bindu Kalesan, y Magdalena Cerda. "State Gun Laws, Gun Ownership, and Mass Shootings in the US: Cross Sectional Time Series." The BMJ 364 (2019): 1542. https://doi.org/10.1136/bmj.l542.

Cita MLA (9a ed.)

Reeping, Paul M., et al. "State Gun Laws, Gun Ownership, and Mass Shootings in the US: Cross Sectional Time Series." The BMJ, vol. 364, 2019, p. 1542, https://doi.org/10.1136/bmj.l542.