Cita APA (7a ed.)

Howard, K. A., Flora, J., & Griffin, M. (1999). Violence-prevention programs in schools: State of the science and implications for future research. Applied & preventive psychology, 8(3), 197-215.

Cita Chicago Style (17a ed.)

Howard, K. A., J. Flora, y M. Griffin. "Violence-prevention Programs in Schools: State of the Science and Implications for Future Research." Applied & Preventive Psychology 8, no. 3 (1999): 197-215.

Cita MLA (8a ed.)

Howard, K. A., et al. "Violence-prevention Programs in Schools: State of the Science and Implications for Future Research." Applied & Preventive Psychology, vol. 8, no. 3, 1999, pp. 197-215.