Linking directly to the web page containing the content you wish to use is almost always permitted. If you have reason to believe that the website may contain content posted without the permission of the copyright owner, you should avoid linking to it. 

If you want to copy content from a website, rather than link to it, you must comply with statements prohibiting copying of material on the site or indicating that permission is required to copy the content. Such statements are typically found in sections titled ‘Terms of Use’ or ‘Legal Notices,’ and are often linked from the very bottom (footer) of the page.