APA (7th ed.) Citation

HA, H., PA, D., AM, E., RS, E., KA, M., & RG, F. (2003). The effect of incentive-based formularies on prescription-drug utilization and spending. New England Journal of Medicine, 349(23), 2224.

Chicago Style (17th ed.) Citation

HA, Huskamp, Deverka PA, Epstein AM, Epstein RS, McGuigan KA, and Frank RG. "The Effect of Incentive-based Formularies on Prescription-drug Utilization and Spending." New England Journal of Medicine 349, no. 23 (2003): 2224.

MLA (9th ed.) Citation

HA, Huskamp, et al. "The Effect of Incentive-based Formularies on Prescription-drug Utilization and Spending." New England Journal of Medicine, vol. 349, no. 23, 2003, p. 2224.