Cite
Three unusual cases of parasystole
MLA
David Scherf, and Linn J. Boyd. “Three Unusual Cases of Parasystole.” American Heart Journal, vol. 39, no. 5, May 1950. 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=edsair&AN=edsair.doi.dedup.....a1db0b7a6ca433f63ea7eed89b12f64c&authtype=sso&custid=ns315887.
APA
David Scherf, & Linn J. Boyd. (1950). Three unusual cases of parasystole. American Heart Journal, 39(5).
Chicago
David Scherf, and Linn J. Boyd. 1950. “Three Unusual Cases of Parasystole.” American Heart Journal 39 (5). 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=edsair&AN=edsair.doi.dedup.....a1db0b7a6ca433f63ea7eed89b12f64c&authtype=sso&custid=ns315887.