APA (7th ed.) Citation

Appleby, P., Key, T., Thorogood, M., Burr, M., & Mann, J. (2002). Mortality in British vegetarians.

Chicago Style (17th ed.) Citation

Appleby, P., T. Key, M. Thorogood, M. Burr, and J. Mann. Mortality in British Vegetarians. 2002.

MLA (9th ed.) Citation

Appleby, P., et al. Mortality in British Vegetarians. 2002.