Wen, M., Li, L., & Su, D. (2013). Physical activity and mortality among middle-aged and older adults in the United States.
استشهاد بنمط شيكاغوWen, Ming, Lifeng Li, و Dejun Su. Physical Activity and Mortality Among Middle-aged and Older Adults in the United States. 2013.
MLA استشهادWen, Ming, Lifeng Li, و Dejun Su. Physical Activity and Mortality Among Middle-aged and Older Adults in the United States. 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.