Lactose intolerance.

MLA

Swagerty, Daniel L., Jr, et al. “Lactose Intolerance.” American Family Physician, vol. 65, no. 9, May 2002, pp. 1845–50. 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=cmedm&AN=12018807&authtype=sso&custid=ns315887.

APA

Swagerty, D. L., Jr, Walling, A. D., & Klein, R. M. (2002). Lactose intolerance. American Family Physician, 65(9), 1845–1850.

Chicago

Swagerty, Daniel L, Jr, Anne D Walling, and Robert M Klein. 2002. “Lactose Intolerance.” American Family Physician 65 (9): 1845–50. 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=cmedm&AN=12018807&authtype=sso&custid=ns315887.