APA (7th ed.) Citation

BL, H., MS, K., & RW, P. (2001). Maternal smoking and the risk of early weaning: A meta-analysis. American Journal of Public Health, 91(2), 304. https://doi.org/10.2105/ajph.91.2.304

Chicago Style (17th ed.) Citation

BL, Horta, Kramer MS, and Platt RW. "Maternal Smoking and the Risk of Early Weaning: A Meta-analysis." American Journal of Public Health 91, no. 2 (2001): 304. https://doi.org/10.2105/ajph.91.2.304.

MLA (9th ed.) Citation

BL, Horta, et al. "Maternal Smoking and the Risk of Early Weaning: A Meta-analysis." American Journal of Public Health, vol. 91, no. 2, 2001, p. 304, https://doi.org/10.2105/ajph.91.2.304.