Do I need permission to use poems and songs?
Yes, permission should always be obtained. Please be aware that some poets will not allow changes to the layout of the poem or allow you to use a small number of lines. Poem fees are normally charged per line.
With song lyrics you should be aware that even if you only use one line you may be charged the same price as you would for the complete song. Rightsholders for song lyrics require people intending to reproduce lyrics to apply for permission for each reuse, and a fee may be charged.