APA (7th ed.) Citation
S, P., AV, S., W, F., & S, S. (2009). Manifestation of left atrial events and interatrial frequency gradients in the surface electrocardiogram during atrial fibrillation: Contributions from posterior leads. Journal of Cardiovascular Electrophysiology, 20(11), 1231-1237.
Chicago Style (17th ed.) Citation
S, Petrutiu, Sahakian AV, Fisher W, and Swiryn S. "Manifestation of Left Atrial Events and Interatrial Frequency Gradients in the Surface Electrocardiogram During Atrial Fibrillation: Contributions from Posterior Leads." Journal of Cardiovascular Electrophysiology 20, no. 11 (2009): 1231-1237.
MLA (9th ed.) Citation
S, Petrutiu, et al. "Manifestation of Left Atrial Events and Interatrial Frequency Gradients in the Surface Electrocardiogram During Atrial Fibrillation: Contributions from Posterior Leads." Journal of Cardiovascular Electrophysiology, vol. 20, no. 11, 2009, pp. 1231-1237.
Warning: These citations may not always be 100% accurate.