APA (7th ed.) Citation

Simon, T. R., Crosby, A. E., & Dahlberg, L. L. (1999). Students who carry weapons to high school. Journal of adolescent health, 24(5), 340-348.

Chicago Style (17th ed.) Citation

Simon, Thomas R., Alex E. Crosby, and Linda L. Dahlberg. "Students Who Carry Weapons to High School." Journal of Adolescent Health 24, no. 5 (1999): 340-348.

MLA (8th ed.) Citation

Simon, Thomas R., et al. "Students Who Carry Weapons to High School." Journal of Adolescent Health, vol. 24, no. 5, 1999, pp. 340-348.