Let me explain after trying to Google, I cannot find information on how to quote a review/testimonial from a critic at a publication outside of the main text. The testimonial/reviews are listed at the end, sort of what you may see on posters for plays or customer reviews on a business flyer, but I don't know if that is the proper way. It's for a brochure, if that helps. Normally, I would incorporate a quote in-text, but in this case, I cannot.
Edit: I am finding customer testimonials have many examples such as here ex1, but in the case of critic review from a magazine for example, I'm lost.
Example:
Main text
blah blah, CEO stated, "some quote" (citation here).
. . . end of main text
.
.
.
.
."Softest mattress ever! O-M-G!" (John Doe, The Herald, 2010).
or is it written like an epigraph?
"The ennui killed me. Thumbs down!" --John Doe, The Herald
"Oh boy!" --Amazon Customer