WHO: Refers to the author, publisher, or organization of the information
It's important to ask:
Is there an identifiable author of the information? If not, that may be a red flag. Note: Authorship can refer to a person, publisher, or organization.
What are the author's credentials? The authority of the author lends credibility to the information. Are they experts in the field? Remember that authority is contextual. Being a rocket scientist would not give someone authority to write about behavior modification in the classroom.
Has the author published on this subject before?
Does the author have any relevant affiliations with a respected university or organization? What can you find about the author online?
What is the author's interest (if any) in this information (commercial gain)? Do they have a particular agenda (to sway opinion)?
Additional Internet Source Consideration:
Is there clearly identifiable author, publisher, or organization listed on the site?