User-agent: Mediapartners-Google*
Disallow:
User-agent: TurnitinBot                                                                         
Disallow: /            #Will disallow all urls on your site        

User-agent: TurnitinBot                                                                         
Disallow: /hide/     #Will disallow any url starting with /hide/                                
                                                                                                     
#This is an example robots.txt file