What precisely is the difference, everyone, between a "credible" source and a "scholarly" source? (Hint: Consider audience and purpose!)

A lot of industries have trade publications, which are magazines and journals published specifically for people in that industry. These publications share strategies, observations, interviews, and other information specific to concerns of people within that industry (including advertisements that target equipment or services specific to that industry).

Are such trade publications credible? Are they scholarly? Would you or would you not cite from them if preparing a professional report or publication within that industry, everyone?

What are some trade publications relevant to your current industry or planned-for industry in the future? (It's okay to do research to answer this question!)