Just try doing it intuitively; it's quite easy.
Do one algorithm - inspect. Okay. Coolio; neat.
Do the other algorithm - inspect. Okay. Coolio; neat.
That's what I did...
However, if there is a link, I suppose it would help. I don't have one though.
Or just use the page on the wiki for
PLL and scroll down to the G Permutation. Ignore the arrows. Look at the colours on the sides. See the headlights? See the 2x1 block? Yeah; that's it.