What terms to add to lease for roommates?

[Igor Nastaskin]

Hi, I have 5 students/roommates apply for tenancy (in California) for one of the units of a fourplex in California. 3 students have cosigners (parents), one cosigner is architect and one is an out of state judge. This is my first time leasing to roommates - is this a good idea? My pm provided a standard california rental agreement - what extra terms must I include for my protection?

Thank you!