How to cite a paragraph from a paper with a citation in it
Normally, you would switch between double and single ticks for the outer and inner quotation, respectively.

Alternatively, for a quotation of the length you are showing, consider using a (slightly indented) quotation block.

I will look for some examples when I have a stable connection again.

Of course, you should also check the styleguide of your target venue, although in my experience, paper styleguides rarely mention such details/special cases.