APA (7th ed.) Citation

Ramirez, G., Grimes, R. M., Annegers, J. F., Davis, B. R., & Slater, C. H. (1990). Occupational Physical Activity and other Risk Factors for Preterm Birth among US Army Primigravidas. American Journal of Public Health, 80(6), 728. https://doi.org/10.2105/AJPH.80.6.728

Chicago Style (17th ed.) Citation

Ramirez, Gilbert, Richard M. Grimes, John F. Annegers, Barry R. Davis, and Carl H. Slater. "Occupational Physical Activity and Other Risk Factors for Preterm Birth Among US Army Primigravidas." American Journal of Public Health 80, no. 6 (1990): 728. https://doi.org/10.2105/AJPH.80.6.728.

MLA (9th ed.) Citation

Ramirez, Gilbert, et al. "Occupational Physical Activity and Other Risk Factors for Preterm Birth Among US Army Primigravidas." American Journal of Public Health, vol. 80, no. 6, 1990, p. 728, https://doi.org/10.2105/AJPH.80.6.728.