Should newspaper reporters be required to reveal their sources?

I think all newspaper reporters should be required to reveal their sources. If you are going to be publishing something for all eyes to see you should reveal where you got your information from whether it be a person or place. I think this because it will cause the reporters to be honest on what they write about. Its shows you can truely trust what you read. Ecspecially if someone is quoting what another person has said or if they are writing a article on another person, they should always state who or where they heard the information. I think that revealing sources would also help improve reporters to write and share stuff that actually matters and stuff the readers can benefit from and prevent reporters copying from other reporters.

Sources:

http://www.google.com/imgres?imgurl=http://www.lcsc.edu/library/ili/classes/j0314269.jpg&imgrefurl=http://www.lcsc.edu/library/ili/classes/college_writing.htm&usg=___yURfd1SpXAgte7l8skcdZC7y_8=&h=405&w=600&sz=39&hl=en&start=0&zoom=1&tbnid=2fk_IEyK7JBHwM:&tbnh=112&tbnw=162&ei=Ds5pTca8K5GXtwfSspzoAw&prev=/images%3Fq%3Dnews%2Bpaper%26um%3D1%26hl%3Den%26safe%3Doff%26sa%3DN%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26biw%3D1003%26bih%3D539%26tbs%3Disch:10%2C81&um=1&itbs=1&iact=hc&vpx=113&vpy=244&dur=78&hovh=184&hovw=273&tx=148&ty=179&oei=Ds5pTca8K5GXtwfSspzoAw&page=1&ndsp=18&ved=1t:429,r:12,s:0&biw=1003&bih=539