I'm confused about how to cite to a final judgment (R. at 17) and an affidavit (R. at 28) in the record.

I was citing to the final judgment as (B7): blah blah blah. R. at 17.

That's the way the Bluebook seems to say. My friend told me he is doing it as (B7+BT1): blah blah blah. Final J. at 17.

I went online to search who was correct and the Cornell website seems to say we are both wrong. They say it should be (BT+BT1+Parentheses): blah blah blah (Final J. at 17).

So which is it?

Samples in my text book have it as: blah blah blah (R. 17).

WTF?

I use R.

Edit: Ok. So I see using (R. x) for appellate records, but I also see info on citing to a deposition, etc. My professor told us to use R to cite anywhere in the record, so I'm just going to do that.

R. at # or R. #?

R. #