Because it is a news subject, not an academic subject, it is recommended not to mark it. If annotation: you can annotate the reference in the annotation or in the reference: when annotation, you should put the numbers ([1], [2], [3] ...) after the cited article, and then insert the annotation at the superscript number, and write the source of the article clearly when inserting. Note in the references that you don't need to bid in the article, just write it at the back of the article. If you mean the network, you can use "z" to identify it.