explain some of the princeples used in selection of secondary sources, including internate and non internate sources

Selecting secondary sources is important for conducting detailed and well-informed research. These sources provide analysis, interpretation, and commentary on primary materials, offering a broader perspective and deeper understanding of the topic. They validate the arguments, and add credibility to your work. Secondary sources also enhance the overall rigor and credibility of project because, quality secondary sources demonstrate that you've conducted thorough research.