I beieve, and you should check to be certain, that any written information that is publicly available can be quoted or cited if it is not the basis upon which the person republishing the information intends to provide for financial gain/profit. You cannot pass the information off as your original content either, unless you can prove that you had the same idea or drew the same conclusions separately and prior to being exposed to the content in question. I have seen a number of published articles discussing and either supporting or discrediting others’ published writings/opinions, that didn’t appear to give any more credit than stating the name of the publication and author. If you are using another authors text in a publication, you should always give the author credit and cite the original text/publication.
I am not a copyright lawyer. So, if you are concerned, you could always contact the publisher and ask if your use is something that they would object to your doing. And if you have a legal department or council, you could ask them.