APA (7th ed.) Citation

Roffman, C. E., Buchanan, J., & Allison, G. T. (2016). Charlson Comorbidities Index. Elsevier.

Chicago Style (17th ed.) Citation

Roffman, Caroline E., John Buchanan, and Garry T. Allison. Charlson Comorbidities Index. Elsevier, 2016.

MLA (8th ed.) Citation

Roffman, Caroline E., et al. Charlson Comorbidities Index. Elsevier, 2016.