03-21-2014, 08:49 PM
It's a good question and probably not a matter of recognizing the source or not. Unquoted lines from another author's poem within the body of your own may appear to be plagiarism. In quotes, we might assume it is another's, but that is not giving credit. In scientific writing, it would not be acceptable to leave it uncited. Footnoting might be the best practice, but could effect the poetry aesthetics*. I would probably put the entire quote and author credit in a preface or afterword, if it were my poem.
My new watercolor: 'Nightmare After Christmas'/Chris