APA (7th ed.) Citation

E, M., J, W., & L, S. (2002). Mother-to-child transmission of HIV-1 infection. Lancet, 360(9333), 643. https://doi.org/10.1016/s0140-6736(02)09794-5

Chicago Style (17th ed.) Citation

E, Montgomery, Wells J, and Strani L. "Mother-to-child Transmission of HIV-1 Infection." Lancet 360, no. 9333 (2002): 643. https://doi.org/10.1016/s0140-6736(02)09794-5.

MLA (9th ed.) Citation

E, Montgomery, et al. "Mother-to-child Transmission of HIV-1 Infection." Lancet, vol. 360, no. 9333, 2002, p. 643, https://doi.org/10.1016/s0140-6736(02)09794-5.