The first step will be to read the Internal Control Discussion document. The second step will be to decide on your type of company and a backup type of company in case the first one does not work well (i.e. you can’t get the information). The best sources for you to use (pretty much in order) are:
A company you are working for or have worked for in the past
A company owned by someone close to you (a family member or friend)
A type company you would like to work for
The last choice would be online research.