Sir Alex Ferguson ignored Lionel Messi plan despite Park Ji-sung's consent at Man Utd - Mirror Online
Ferguson to manage United again
Ferguson admits regrets over 2008 and 2011 CL finals - Football365
Sir Alex Ferguson only has one regret from the 2008 Champions League final
Manchester United legend Sir Alex Ferguson opens up on 2008 regret - Daily Star
Sir Alex reveals big Messi regret after losing 2011 Champions League final
Sir Alex Ferguson reveals Man Utd decision he 'regrets to this day'
What do you think would happen if Park Ji Sung in his prime was in our current squad? : r/ManchesterUnited
Sir Alex Ferguson reveals the one major regret of his Manchester United days, The Independent