Fortunately, Drupal 8 is not needed. It is possible to build references to the role using core fields.
You can read how to do this here - http://zanzarra.com/blog/referencing-roles-drupal-7-8-entities#howto
- Maintenance status: Minimally maintained
- Development status: Maintenance fixes only
- Module categories: Content Construction Kit (CCK), Fields
- Reported installs: 1,819 sites currently report using this module. View usage statistics.
- Downloads: 16,750
- Last modified: May 24, 2016
- Stable releases receive coverage from the Drupal Security Team.
Look for the shield icon below.