Hey Frugal,
I love your site by the way and had bookmarked it from your previous posts, I just got a new house and I am starting a garden and so it has been very helpful.
When I write reviews I find that it really gives credibility to it to quote snipets from authority sites. and it is not illegal at all as long as you site the source, I do not add the link if I only take a few sentence from that source, I just use a "block quote" with the html tags and site the source below the quotes.
I think I would only add the link if I was giving that link as a reference to the reader and wanted them to have it in its entirety.
Another option is to use the block quote and then give the link at the end of the review as a resource.
The benefit of not giving the full link within the article body is that your reader stays with you to the end, rather than leaving your page to read the other source.
Hope this helps!!
