APA (7th ed.) Citation
PMA, C., P, W., Calverley, P. M. A., & Walker, P. (2003). Chronic obstructive pulmonary disease. Lancet, 362(9389), 1053-1062.
Chicago Style (17th ed.) Citation
PMA, Calverley, Walker P, P M A. Calverley, and Paul Walker. "Chronic Obstructive Pulmonary Disease." Lancet 362, no. 9389 (2003): 1053-1062.
MLA (9th ed.) Citation
PMA, Calverley, et al. "Chronic Obstructive Pulmonary Disease." Lancet, vol. 362, no. 9389, 2003, pp. 1053-1062.
Warning: These citations may not always be 100% accurate.