Sildenafil inhibits beta-adrenergic-stimulated cardiac contractility in humans.

MLA

Borlaug BA, et al. “Sildenafil Inhibits Beta-Adrenergic-Stimulated Cardiac Contractility in Humans.” Circulation, vol. 112, no. 17, Oct. 2005, pp. 2642–49. 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=edb&AN=106137771&authtype=sso&custid=ns315887.

APA

Borlaug BA, Melenovsky V, Marhin T, Fitzgerald P, & Kass DA. (2005). Sildenafil inhibits beta-adrenergic-stimulated cardiac contractility in humans. Circulation, 112(17), 2642–2649.

Chicago

Borlaug BA, Melenovsky V, Marhin T, Fitzgerald P, and Kass DA. 2005. “Sildenafil Inhibits Beta-Adrenergic-Stimulated Cardiac Contractility in Humans.” Circulation 112 (17): 2642–49. 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=edb&AN=106137771&authtype=sso&custid=ns315887.