How to block facebook with https?

Can anyone tell me the steps to block facebook with https. I am using microtik router V6. I have tried the Layer 7 ptotocols and also the address list. Also created a firewall rule to DROP them. But I couldn’t block the site.

for the sake of those who use your network i will not answer this. If you want to block facebook apps i’ll be all for it but not facebook itself. It is very easy to block facebook though or even redirect it to renren lol.