Which of the following are "correct" ways to abbreviate Nota Bene?
- N.B. blahblah
- n.b. blahblah
- NB. blahblah
- nb. blahblah
- NB: blahblah
- nb: blahblah
- NB blahblah
- nb blahblah
Authoritative sources would be much appreciated.
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The Chicago Manual of Style says:
CMS adds that "Latin abbreviations are often set in roman" (i.e. not italic).
I tend to see