The plot summary for a work, on a page about that work, does not need to be sourced with in-line citations, as it is generally assumed that the work itself is the primary source for the plot summary. However, editors are encouraged to add sourcing if possible. If a plot summary includes a direct quote from the work, this must be cited using inline citations per WP:QUOTE . Sometimes a work will be summarized by secondary sources, which can be used for sourcing. Otherwise, using brief quotation citations from the primary work can be helpful to source key or complex plot points.