That might not even be legal. Reproducing any work, even that of a website, is subject to copyright law. It's generally understood that "reproducing only for your private use" means to prohibit you from denying the source author compensation for disseminating work. All articles, including critical and scientific articles, are subject to licensing fees. In the stone age, your local library would buy a book and, if you wanted to quote and source it, you had to check the book out, actually read it, and return it - you couldn't quote verbatim the entirety of the book or photocopy its pages and then dissmenate them. The prohibition would be printed somewhere on either the back of the title page or at the very back. Nowadays, websites have a similar disclaimer that can appear usually on the very bottom of the page under "Terms of Use" and includes a section called "Copyright Ownership" which says much the same thing. My advice to you is to have a seperate page where you re-list all your sources and say that permission to copy and submit was not permitted by the author.