APA (7th ed.) Citation

PP, H., I, H., & C, P. (2007). Conditions for bias from differential left truncation. American Journal of Epidemiology, 165(4), 444.

Chicago Style (17th ed.) Citation

PP, Howards, Hertz-Picciotto I, and Poole C. "Conditions for Bias from Differential Left Truncation." American Journal of Epidemiology 165, no. 4 (2007): 444.

MLA (9th ed.) Citation

PP, Howards, et al. "Conditions for Bias from Differential Left Truncation." American Journal of Epidemiology, vol. 165, no. 4, 2007, p. 444.