He refers to /calls himself (as) the King of Kings.
(I think refer can be apt if it is any one other than the speaker.) Since I am not a native speaker, I base this proposition just on the basis of hearing something unusual and hence what I think can be completely wrong.
Top answer
She was boastful of/about her work. about . of seems much more formal or old-fashioned to me.
— CalifJim
She was boastful of/about her work.
about .
of seems much more formal or old-fashioned to me.
His last speech is/was a memorable one.
was .
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