You have to consider whether you are informed of facts and well-documented research. The author may wish to convince you or sell you something. Beware of great words such as: the best, the fastest, the most reliable, the safest, the greatest, the biggest and last, but not least: all research shows that…
- Does the author actually know what they are talking about? Has the author published something on this subject in respected journals? Search the library databases.
- Has the author published anything about the topic through a reputed publisher?
- Does the source illuminate several sides of the presented subject?
- Is the topic controversial? (e.g. climate change and topics on health- or nutrition). Make sure to get a broad picture of the current debate and find actual research about the topic.
- Does the source give information about which special field is covered and what level it is written for?
- Are the sources listed, and are they of high quality?