Interesting..

You see I'd have transposed the last two.

'From the singing of' means -to me - I only ever hear them sing it (on record or in person).

'From' implies a personal contact.

No wonder I'm so often confused!

I don't bother to credit trad songs that everyone knows ( but always credit covers though, on principle), but if I think it may be less well known I cite the recording if it came from one, or just the name if we'd a conversation about it.

I'm not clever enough to pick up a whole song from one performance, so I never use 'from the singing of.'

When someone says that I assume they either heard it many times (as members of same club or family perhaps) or got it from a record - in which case I wish they say so.

Tom