A location would help; depending on where in the world you call home, laws vary greatly, and what's relevant in the UK, might be totally inappropriate in Zimbabwe.
American Society of Media Photographers - Homepage or PPA are pro photographers organizations. I've use ASMP who offers info. on licensing usage, sample contracts, and releases (including a 'pocket' release and an app). There's also a 'paperwork' share where you can see actual contracts for jobs.