Use ellipsis marks to indicate a deliberate omission within a quotation or to mark a dramatic pause in a sentence. Type ellipsis marks as three spaced periods (. . .), with a space before the first period and following the last period.
If you omit the end of a quoted sentence or if you omit a sentence or more from the middle of a quoted passage, add a sentence period and a space before the first ellipsis mark.
Do not use opening or closing ellipsis marks if the quotation is clearly only part of a sentence.
For more on ellipsis marks, see Chapter 10 and Chapter 26.