Very important question! My friend Félix and I have a group called "Asteflix Novices". We have no idea if the correct way of spelling it would be "Asteflix' Novices" or "Asteflix's Novices".
I heard at school that words ending in S and X would take only an ' while the rest get an 's, but Félix doesn't believe it's correct. Who is right? What is the correct rule?