When did Ferguson retire?

Related questions

1. When was the last time Manchester United won the Premier League?
2. How many times Chelsea have won the Premier League?
3. How many times has Chelsea been relegated?
4. How many times Manchester United won EPL?
5. How many times have Chelsea won the EPL?

Tags

1. #busby
2. #premier
3. #retired
4. #december
5. #having
6. #season
7. #united
8. #ferguson
9. #league
10. #overtaken
11. #management
12. #manager
13. #record
14. #serving
15. #longest
16. #manchester
17. #final