Cite
Helicobacter pylori infection rates in relation to age and social class in a population of Welsh men
MLA
Sitas, F., et al. “Helicobacter Pylori Infection Rates in Relation to Age and Social Class in a Population of Welsh Men.” Gut, vol. 32, no. 1, Jan. 1991, p. 25. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsggo&AN=edsgcl.10421065&authtype=sso&custid=ns315887.
APA
Sitas, F., Forman, D., Yarnell, J. W. G., Burr, M. L., Elwood, P. C., Pedley, S., & Marks, K. J. (1991). Helicobacter pylori infection rates in relation to age and social class in a population of Welsh men. Gut, 32(1), 25.
Chicago
Sitas, F., D. Forman, J.W.G. Yarnell, M.L. Burr, P.C. Elwood, S. Pedley, and K.J. Marks. 1991. “Helicobacter Pylori Infection Rates in Relation to Age and Social Class in a Population of Welsh Men.” Gut 32 (1): 25. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsggo&AN=edsgcl.10421065&authtype=sso&custid=ns315887.