APA (7th ed.) Citation

JO, E., KD, W., A, Z., MV, B., & J, H. (2009). Clinical utility of varenicline for smokers with medical and psychiatric comorbidity. International journal of chronic obstructive pulmonary disease, 4, 421. https://doi.org/10.2147/copd.s6300

Chicago Style (17th ed.) Citation

JO, Ebbert, Wyatt KD, Zirakzadeh A, Burke MV, and Hays J. "Clinical Utility of Varenicline for Smokers with Medical and Psychiatric Comorbidity." International Journal of Chronic Obstructive Pulmonary Disease 4 (2009): 421. https://doi.org/10.2147/copd.s6300.

MLA (9th ed.) Citation

JO, Ebbert, et al. "Clinical Utility of Varenicline for Smokers with Medical and Psychiatric Comorbidity." International Journal of Chronic Obstructive Pulmonary Disease, vol. 4, 2009, p. 421, https://doi.org/10.2147/copd.s6300.