How to abbreviate Opus?

The ways to abbreviate Opus.

1
O.:
Opus(Roman, Latin)
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APASmart Define. (2018). opus. Retrieved September 20, 2026, from http://smartdefine.org/opus/abbreviations/a
ChicagoSmart Define. 2018. "opus" http://smartdefine.org/opus/abbreviations/a (accessed September 20, 2026).
HarvardSmart Define 2018, opus, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/opus/abbreviations/a>.
MLASmart Define. "opus" 31 January 2018. Web. 20 September 2026. <http://smartdefine.org/opus/abbreviations/a>