To reference repetitions of a field you would use something like :
table::field for the second repetition.
Also, If you are using Summary fields, there is an option which allows you to either Summarize repetitions 'All together' or 'individually'
If you choose individually, the summary will have the same number of repetitions as the field it is summarising. i.e
Repeating field named "test" - Test contains values of |10|20|30|40|
Test would return 20
Summary Field with Total of Test (all Together) would return 100
Summary Field with Total of Test (individually) would return |10|20|30|40| in their own repetition.