Twinning.

MLA

Hall, Judith G. “Twinning.” Lancet (London, England), vol. 362, no. 9385, Aug. 2003, pp. 735–43. EBSCOhost, https://doi.org/10.1016/S0140-6736(03)14237-7.

APA

Hall, J. G. (2003). Twinning. Lancet (London, England), 362(9385), 735–743. https://doi.org/10.1016/S0140-6736(03)14237-7

Chicago

Hall, Judith G. 2003. “Twinning.” Lancet (London, England) 362 (9385): 735–43. doi:10.1016/S0140-6736(03)14237-7.