This ultimately depends on your style guide, although it will be usually some type of ellipsis that you will need to use. The major American style guides that I checked all use ellipses with spaces next to each period(
. . .).
From the APA Blog:
In APA Style, double quotation marks are used to enclose
quoted material, and an ellipsis is a set of three spaced periods used to show that material has been omitted from a quotation.
The Perdue OWL specifies that MLA is the same:
If you omit a word or words from a quotation, you should indicate the deleted word or words by using ellipses, which are three periods ( . . . ) preceded and followed by a space.
And CMOS too, from the site CMOS Shop Talk:
When words are left out of a quotation, an ellipsis of three dots (. . .) takes their place. When this works correctly, the reader can skip over the dots and the sentence continues smoothly on the other side.
. . .
Chicago style puts a space between ellipsis dots. A period before an ellipsis closes up to the preceding word as usual, but a space comes between the period and the ellipsis.