learn2read
Self-published or questionable sources may be used as sources of information about themselves, especially in articles about themselves, without the requirement that they be published experts in the field, so long as:

 the material is neither unduly self-serving nor an exceptional claim;
 it does not involve claims about third parties (such as people, organizations, or other entities);
 it does not involve claims about events not directly related to the subject; 
 there is no reasonable doubt as to its authenticity;
 the article is not based primarily on such sources.

These requirements also apply to pages from social networking websites such as Twitter, Tumblr, and Facebook.

kthxbye.