Grad, Y. H., Lipsitch, M., & Aiello, A. E. (2012). Secular Trends in Helicobacter pylori Seroprevalence in Adults in the United States: Evidence for Sustained Race/Ethnic Disparities. Oxford University Press.
استشهاد بنمط شيكاغوGrad, Yonatan H., Marc Lipsitch, و Allison E. Aiello. Secular Trends in Helicobacter Pylori Seroprevalence in Adults in the United States: Evidence for Sustained Race/Ethnic Disparities. Oxford University Press, 2012.
MLA استشهادGrad, Yonatan H., Marc Lipsitch, و Allison E. Aiello. Secular Trends in Helicobacter Pylori Seroprevalence in Adults in the United States: Evidence for Sustained Race/Ethnic Disparities. Oxford University Press, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.