Papers released in these journals are qualified-authorized…and by far the most authoritative sources of knowledge for faculty-level research papers. Defining a resource as Key, secondary, or tertiary may also depend on the way you are utilizing the material. A newspaper write-up may very well be both Key and secondary. https://case-study-help11952.thezenweb.com/getting-my-case-study-help-to-work-74426990