APA
Butchart, E. G. (1997). The significance of sudden and unwitnessed death after heart valve replacement. Journal of Heart Valve Disease, 3(1), 1-4.
MLA
Butchart, E G.. "The significance of sudden and unwitnessed death after heart valve replacement." Journal of Heart Valve Disease 3.1 (1997): 1-4.
Chicago
Butchart, E G.. "The significance of sudden and unwitnessed death after heart valve replacement." Journal of Heart Valve Disease 3, no. 1 (1997): 1-4.
Harvard
Butchart, E. G. (1997) 'The significance of sudden and unwitnessed death after heart valve replacement' Journal of Heart Valve Disease 3(1), pp. 1-4.
Vancouver
Butchart EG. The significance of sudden and unwitnessed death after heart valve replacement. Journal of Heart Valve Disease. 1997 ;3(1):1-4.