Here is an extensive list of referral oganizations you can contact.
CareerPage — The National Broadcast Job Bank, created by the National Alliance of State Broadcasters Associations. This should be your first stop for publicizing job openings at your station. If you need your station’s password to enter the “Post-A-Job” area, contact MAB.
Traffic Directors Guild of America : Go to Classified section, then scroll down to bottom of page.
In addition, Media411/TV Jobs hosts a comprehensive list of minority organizations at this web page.