Reporting is a good way to tell the audience about news but you have verify and analyze your news before you report your news. If you did not verify your news the audience will not trust you because perhaps you may get fake news. There are many resource of news but some resource write in positive ways and some resource write in negative ways because it depends on writers (Journalists) perhaps they sided with someone or others , That is not ethic of journalist. For definiteness you must make sure that your news and source is true and has no mistake before you report or coverage this news. And the important things is you honest and justice when you report or coverage do not favor any side ,Even you like this side but you cannot favor them because that is unethical for journalist.
If a source is unhappy about your news report how you might respond and handle the complaint ? , For me If they are unhappy about my report ,I will find the reason why they are unhappy about my report and fix it but it does not matter whether your personally like or dislike your sources ,My responsibility is to report by balance ,fairness and ethical manner. And the important thing Why we want source?. We want source for make sure whether we did not made that news by ourselves. And good journalists always know what sources to quote and what sources to omit from our coverage and They know what their audiences want.
The sources has no effect to you ,If you know which source you should quote and which source you should omit it. And be careful about source you have to make sure that you source is true and verify it before you report or coverage your news.