Vitamins, iron, and physical work.

MLA

Bates, C. J., et al. “Vitamins, Iron, and Physical Work.” Lancet, vol. 334, no. 8658, Aug. 1989, pp. 313–14. EBSCOhost, https://doi.org/10.1016/s0140-6736(89)90495-9.

APA

Bates, C. J., Powers, H. J., & Thurnham, D. I. (1989). Vitamins, iron, and physical work. Lancet, 334(8658), 313–314. https://doi.org/10.1016/s0140-6736(89)90495-9

Chicago

Bates, C J, H J Powers, and D I Thurnham. 1989. “Vitamins, Iron, and Physical Work.” Lancet 334 (8658): 313–14. doi:10.1016/s0140-6736(89)90495-9.