Cite
Effects on birth weight of smoking, alcohol, caffeine, socioeconomic factors, and psychosocial stress.
MLA
Brooke, O. G., et al. “Effects on Birth Weight of Smoking, Alcohol, Caffeine, Socioeconomic Factors, and Psychosocial Stress.” BMJ (Clinical Research Ed.), vol. 298, no. 6676, Mar. 1989, pp. 795–801. EBSCOhost, https://doi.org/10.1136/bmj.298.6676.795.
APA
Brooke, O. G., Anderson, H. R., Bland, J. M., Peacock, J. L., & Stewart, C. M. (1989). Effects on birth weight of smoking, alcohol, caffeine, socioeconomic factors, and psychosocial stress. BMJ (Clinical Research Ed.), 298(6676), 795–801. https://doi.org/10.1136/bmj.298.6676.795
Chicago
Brooke, O G, H R Anderson, J M Bland, J L Peacock, and C M Stewart. 1989. “Effects on Birth Weight of Smoking, Alcohol, Caffeine, Socioeconomic Factors, and Psychosocial Stress.” BMJ (Clinical Research Ed.) 298 (6676): 795–801. doi:10.1136/bmj.298.6676.795.