APA (7th ed.) Citation

DA, L., GD, S., KR, B., D, K., & S, E. (2004). Those confounded vitamins: What can we learn from the differences between observational versus randomised trial evidence? Lancet, 363(9422), 1724. https://doi.org/10.1016/s0140-6736(04)16260-0

Chicago Style (17th ed.) Citation

DA, Lawlor, Smith GD, Bruckdorfer KR, Kundu D, and Ebrahim S. "Those Confounded Vitamins: What Can We Learn from the Differences Between Observational Versus Randomised Trial Evidence?" Lancet 363, no. 9422 (2004): 1724. https://doi.org/10.1016/s0140-6736(04)16260-0.

MLA (9th ed.) Citation

DA, Lawlor, et al. "Those Confounded Vitamins: What Can We Learn from the Differences Between Observational Versus Randomised Trial Evidence?" Lancet, vol. 363, no. 9422, 2004, p. 1724, https://doi.org/10.1016/s0140-6736(04)16260-0.