APA
      Blackstone, E. H. (1996). In response to: Grunkemeier GL, Starr A. Alternatives to randomization in surgical studies. Journal of Heart Valve Disease, 2(1), 119-22.
     
    
      MLA
      Blackstone, E H.. "In response to: Grunkemeier GL, Starr A. Alternatives to randomization in surgical studies." Journal of Heart Valve Disease 2.1 (1996): 119-22.
     
    
      Chicago
      Blackstone, E H.. "In response to: Grunkemeier GL, Starr A. Alternatives to randomization in surgical studies." Journal of Heart Valve Disease 2, no. 1 (1996): 119-22.
     
    
      Harvard
      Blackstone, E. H. (1996) 'In response to: Grunkemeier GL, Starr A. Alternatives to randomization in surgical studies' Journal of Heart Valve Disease 2(1), pp. 119-22.
     
    
      Vancouver
      Blackstone EH. In response to: Grunkemeier GL, Starr A. Alternatives to randomization in surgical studies. Journal of Heart Valve Disease. 1996 ;2(1):119-22.