Ray McCarthy
Sentient Marmite: The Truth may make you fret.
So nested quotes, of alternate type is correct, italics are not. But I confess I'm unsure about the comma. I must re-read Eat Shoots and Leaves. The Penguin guide to Punctuation is very weak on speech as is Essential English by Harold Evans. All the books I have on punctuation and grammar seem more orientated to articles, letters, manuals, technical writing etc. The books I have on writing fiction don't bother with things like punctuation or grammar, they just take it as given that that is a minor issue compared to the "hook", characters, show vs tell, suspense, plot etc.It isn't a quote; it's quoted speech