reference
n//ˈɹɛf.(ə)ɹəns//referens, källhänvisning, källa
A measurement one can compare (some other measurement) to.
Information about a person, provided by someone (a referee) with whom they are well acquainted.
(computing) An object containing information which refers to data stored elsewhere, as opposed to containing the data itself.
(academic writing) A short written identification of a previously published work which is used as a source for a text.
(academic writing) A previously published written work thus indicated; a source.