I wrote a poem as a work. How do I sign it to show it?

It's actually quite simple. Everything you write is called original. The word original has already told others that you wrote it yourself. If you want to publish, just mark the word original in small print in the upper right corner of the poem. A signature is just a motto, or a pen name. I like it or can reflect my own style. It is not clear whether this poem was written by your signature.