As you decide which resources to include in your research, here are some things to think about:
Authority: Who wrote it? What sort of expertise do they have in this area?
Accuracy: Is the author an expert? Is the supporting information cited and correct? Is it in alignment with other research findings or articles?
Objectivity: Are multiple viewpoints considered? Is there any bias? If so, how much?
Coverage: Does it present a broad overview of your topic? Is it detailed and well documented? Is it relevant to your topic?
Currency: When was your resource produced? Does this matter for your topic?
Audience: Is the audience easy to identify? Is the intended audience scholarly or a knowledgable one?