If you're paraphrasing, however, then perhaps it is enough that you provide the source link. But just make sure that you're not making it appear as if the idea or opinion is yours and not from somebody else.
Also, when you quote somebody, provide the source. How would people know if that person really said that if you're not providing the source? We would want to know if the source is legit and confirm that whoever said that really said so. Otherwise, it would so easy to put words in someone else's mouth. But, of course, especially these days, this doesn't apply to widely popular quotes like one from Aristotle, for example.