Campbell, M. E., Gardner, C. E., Dwyer, J. J., Isaacs, S. M., Krueger, P. D., & Ying, J. Y. (1998). Effectiveness of Public Health Interventions in Food Safety: A Systematic Review. Can J Public Health.

Campbell, Monica E., Charles E. Gardner, John J. Dwyer, Sandy M. Isaacs, Paul D. Krueger, and Jane Y. Ying. "Effectiveness of Public Health Interventions in Food Safety: A Systematic Review." Can J Public Health 1998.

Campbell, Monica E., et al. "Effectiveness of Public Health Interventions in Food Safety: A Systematic Review." Can J Public Health 1998.