Heir, T., Erikssen, J., & Sandvik, L. (2013). Life style and longevity among initially healthy middle-aged men: Prospective cohort study. BioMed Central.
استشهاد بنمط شيكاغوHeir, Trond, Jan Erikssen, و Leiv Sandvik. Life Style and Longevity Among Initially Healthy Middle-aged Men: Prospective Cohort Study. BioMed Central, 2013.
MLA استشهادHeir, Trond, Jan Erikssen, و Leiv Sandvik. Life Style and Longevity Among Initially Healthy Middle-aged Men: Prospective Cohort Study. BioMed Central, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.