If anyone has the time, they can go through the players listed on this site http://www.transfermarkt.co.uk/en/spieler/vertragsende/basics_SC3_2014.html and work out which of Rangers' contracts are coming to an end.
You may need to look at the individual players' profiles as it doesn't seem to list the contract end dates on the team list pages. The following players all have contracts ending in 2014 and all on 30.06 - Cribari, Simonsen, Hutton, Mitchell, Wiktorski and Smith. No mention of any ending this month.