Sub Demo()
Application.ScreenUpdating = False
ActiveWindow.View.ShowFieldCodes = True
With ActiveDocument.Range
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "^d CITATION"
    .Replacement.Text = ""
    .Forward = True
    .Wrap = wdFindStop
    .Format = False
    .MatchCase = False
    .MatchWholeWord = False
    .MatchWildcards = False
    .MatchSoundsLike = False
    .MatchAllWordForms = False
    .Execute
  End With
  Do While .Find.Found
    .Start = .Start - 1
    .MoveStartWhile " ", -1
    .Start = .Start - 1
    If .Characters.First Like "[?!:;.]" Then
      .End = .End + 1
      .InsertAfter .Characters.First
      With .Duplicate
        .Collapse wdCollapseStart
        .MoveEndWhile " ", 1
        .Delete
      End With
    End If
    .Collapse wdCollapseEnd
    .Find.Execute
  Loop
End With
ActiveWindow.View.ShowFieldCodes = False
Application.ScreenUpdating = True
End Sub