Where does the featured artist go in iTunes?

I'm trying to organize my iPod playlist. Normally, I put the featured
artist with the main artist, but one website suggested that I put the
featured artist in brackets next to the song name. For example:

My method: Song name: Airplanes; Artist: B.o.B feat. Hayley Williams
Website's method: Song name: Airplanes (feat. Hayley Williams);
Artist: B.o.B

Which is correct?