How to abbreviate Rugby union?

The ways to abbreviate Rugby union.

1
RU:
Rugby union(Rugby, Sport, Wikipedia)
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APASmart Define. (2017). rugby union. Retrieved September 25, 2026, from http://smartdefine.org/rugby_union/abbreviations/a
ChicagoSmart Define. 2017. "rugby union" http://smartdefine.org/rugby_union/abbreviations/a (accessed September 25, 2026).
HarvardSmart Define 2017, rugby union, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/rugby_union/abbreviations/a>.
MLASmart Define. "rugby union" 1 December 2017. Web. 25 September 2026. <http://smartdefine.org/rugby_union/abbreviations/a>