Secondary and primary research — you are expected to read sufficient number of sources to support your ideas with relevant examples and quotes from reputable publications. (custom-essay.ws)
Let's face it: Investors will always be more interested what reputable publication says about a company than what that company says about itself. (inc.com)
Only review for reputable publications, not those that would use your work just to make money for themselves. (sciencemag.org)