APA (7th ed.) Citation

RB, K., L, M., & AM, S. (1997). Comparison of two question sequences for assessing pregnancy intentions. American journal of epidemiology, 145(9), 810. https://doi.org/10.1093/oxfordjournals.aje.a009174

Chicago Style (17th ed.) Citation

RB, Kaufmann, Morris L, and Spitz AM. "Comparison of Two Question Sequences for Assessing Pregnancy Intentions." American Journal of Epidemiology 145, no. 9 (1997): 810. https://doi.org/10.1093/oxfordjournals.aje.a009174.

MLA (9th ed.) Citation

RB, Kaufmann, et al. "Comparison of Two Question Sequences for Assessing Pregnancy Intentions." American Journal of Epidemiology, vol. 145, no. 9, 1997, p. 810, https://doi.org/10.1093/oxfordjournals.aje.a009174.