Ford, E. S. (2015). Trends in mortality from chronic obstructive pulmonary disease among adults in the United States. Chest.
استشهاد بنمط شيكاغوFord, Earl S. "Trends in Mortality From Chronic Obstructive Pulmonary Disease Among Adults in the United States." Chest 2015.
MLA استشهادFord, Earl S. "Trends in Mortality From Chronic Obstructive Pulmonary Disease Among Adults in the United States." Chest 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.