This article is from the sci.lang.translation FAQ, by James Hester (firstname.lastname@example.org) with numerous contributions by others.
In the context of the discussion of poetry and literature translation we
must be aware of the appropriate use of copyrighted material. It is
permitted to use copyrighted material for the purpose of analysing,
reviewing, and critiquing it, but an appropriate reference must be given to
the source of the material. Anyone who writes academic essays or publishes
book reviews in magazines will be familiar with this procedure.