Cite
In-vitro fertilisation or tubal surgery.
MLA
“In-Vitro Fertilisation or Tubal Surgery.” Lancet (London, England), vol. 337, no. 8752, May 1991, pp. 1291–92. 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=1674090&authtype=sso&custid=ns315887.
APA
In-vitro fertilisation or tubal surgery. (1991). Lancet (London, England), 337(8752), 1291–1292.
Chicago
“In-Vitro Fertilisation or Tubal Surgery.” 1991. Lancet (London, England) 337 (8752): 1291–92. 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=1674090&authtype=sso&custid=ns315887.