Ankylosing spondylitis.

MLA

Cyriax, J., et al. “Ankylosing Spondylitis.” British Medical Journal, vol. 1, no. 4605, Apr. 1949, p. 633. 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=18115217&authtype=sso&custid=ns315887.

APA

Cyriax, J., Hart, F. D., & West, H. F. (1949). Ankylosing spondylitis. British Medical Journal, 1(4605), 633.

Chicago

Cyriax, J, F D Hart, and H F West. 1949. “Ankylosing Spondylitis.” British Medical Journal 1 (4605): 633. 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=18115217&authtype=sso&custid=ns315887.