Hi authorship

I remember i entered the bounty campaign but i forgot who is my referral as i enter it on random thread here in bitcoin talk forum. now i am confused in withdraw ATS token Form at :

Authorship Referral link*
Please enter your Authorship referral link you received after you registered for the Bounty Campaign.

what should i write in that?

thanks

and btw i also invested in ico some 7 hours ago