Answer:
If you only want to quote the quote itself, just do it like normal. If you want to quote part of the article that includes the quote, quote as normal but place apostrophes around the quote that's in the article.
Example:
"The literary world was foreign to me at that time, abandoned as soon as I’d graduated college. I was working in healthcare marketing, promoting outpatient surgical solutions for incontinence. Based in Nashville, I traveled the country meeting with urologists, OBGYNs and colorectal surgeons touting the benefits of an implant ('the size of a Peppermint Patty!') proven to eliminate certain kinds of incontinence. I was 28 and at a professional crossroads."