Cita APA (7a ed.)
F, I., S, B., H, U., A, N., & BK, K. (2008). Effect of sildenafil citrate (viagra) on coronary flow in normal subjects. Echocardiography, 25(1), 72-77.
Cita Chicago Style (17a ed.)
F, Ishikura, Beppu S, Ueda H, Nehra A, y Khandheria BK. "Effect of Sildenafil Citrate (viagra) on Coronary Flow in Normal Subjects." Echocardiography 25, no. 1 (2008): 72-77.
Cita MLA (9a ed.)
F, Ishikura, et al. "Effect of Sildenafil Citrate (viagra) on Coronary Flow in Normal Subjects." Echocardiography, vol. 25, no. 1, 2008, pp. 72-77.
Precaución: Estas citas no son 100% exactas.