Analysis of information sources in references of the Wikipedia article "واحد نجومی" in Persian language version.
Use standard abbreviations for SI... and natural units (e.g. , au, pc, cm).
The XXVIII General Assembly of International Astronomical Union … recommends … 5. that the unique symbol "au" be used for the astronomical unit.
The XXVIII General Assembly of International Astronomical Union recommends [adopted] that the astronomical unit be re-defined to be a conventional unit of length equal to exactly ۱۴۹۵۹۷۸۷۰۷۰۰ metres, in agreement with the value adopted in IAU 2009 Resolution B2
"The units of length/distance are Å, nm, µm, mm, cm, m, km, au, light-year, pc.
Use standard abbreviations for SI... and natural units (e.g. , au, pc, cm).
