Reliability means that the entities that sponsored, supported, or published the information source have a reputation for quality, and integrity. The entity can be a journal, book publisher, movie studio, any kind of organization that puts information out on a website, etc.
Plus, with scholarly information sources, it is easy to identify:
You can learn a lot about an information source by looking at the organization(s) responsible for producing it. Some questions to ask when encountering non-scholarly information sources:
Authority means that the creator of the information source is an expert in the field. The creator can be an author, multiple authors, or an organization, government agency, company, etc.
Author of a book or article:
Company or organization as creator of online content:
Every field of study answers that question differently, but there are some ideas that are generally considered invalid, no matter whether an information source is scholarly or non-scholarly, and no matter what discipline or subject area it falls under.
Accuracy seems like the easiest of the criteria for judging an information source. Is the information presented correct, or not? It is a simple concept, but it does not necessarily have easy answer.
Verify against other information sources
You should already be using multiple information sources for your research, and you will notice discrepancies. If there are no discrepancies in the information, the source is probably accurate. If there are discrepancies, you need to decide which information source(s) you trust more, based on the other evaluative criteria.