to list the source(s) from which one took information, words or literary or verbal context.
to quote; to repeat, as a passage from a book, or the words of another.
to summon officially or authoritatively to appear in court.
a citation
To be specific about (individual instances); to go into detail (about), to specify.
To differentiate, make distinct from others.
To make particular, as opposed to general; to restrict to a specific or individual case, class etc.; to single out.