Before any editor, reporter, or other writer for any newspaper, periodical, radio station, television station, or internet news source, or publisher of any newspaper, periodical, or internet news source, or manager or owner of any radio station shall be required to disclose to any grand jury or to any other authority the source of information used as the basis for any article he or she may have written, published, or broadcast, it must be shown that the article was written, published, or broadcast in bad faith, with malice, and not in the interest of the public welfare.