how to do notecards if there is no author?

answers1:If you can't find ANY authors to your sources, that should
concern you a little. But if the author is not listed and you tried to
find it, you can leave the author off and start with the next piece
you have. Don't write "no author" or anything like that. You should
try to find at least one author so your teacher will know that you
know you should put the author first in a citation. If not, it's okay,
just explain it to them.