None of the site you give meets Wikipedia requirements for references Please see WP V the editor wishing to add the material is responsible for supplying a credable reference In this case a historical work showing that the symbol was used by the Golden Dawn and NOT some successor organization Stella Matutina modern G D reconstruction etc That is a book reference with a page number so other editors can verify it Per WP V any editor may remove uncited additions The burden of proof is on the editor who wishes to make the addition In any case it doesn t belong at the top of the article