You can use two methods . A whistle or an electronic predator call.
The whistle , just Google " Tenterfield Fox whistle " is used to mimic a rabbit in distress . It works best under a spot light at night but still can be used during the day if you are well hidden , and don't move too much.
This vid gives you some idea although the whistle used in the vid is not the best sound.
Electronic predator calls are available from several manufacturers.
Electronic Calls - AllPredatorCalls.com