APA
Blackstone, E. H. (1997). Current state of risk factor analysis. Journal of Heart Valve Disease, 3(1), 45-48.
MLA
Blackstone, E H.. "Current state of risk factor analysis." Journal of Heart Valve Disease 3.1 (1997): 45-48.
Chicago
Blackstone, E H.. "Current state of risk factor analysis." Journal of Heart Valve Disease 3, no. 1 (1997): 45-48.
Harvard
Blackstone, E. H. (1997) 'Current state of risk factor analysis' Journal of Heart Valve Disease 3(1), pp. 45-48.
Vancouver
Blackstone EH. Current state of risk factor analysis. Journal of Heart Valve Disease. 1997 ;3(1):45-48.