Requisitions Export XML format - need subquery to filter on Recruitment Source

Summary

TCC script to export the requisition for selected Recruitment Sources in XML format

Content

I am working on a TCC script that will allow me to export all the requisition posted to selected Recruitment Sources. The export file needs to be in XML format. So far, I have been able to build the TCC script using SourcingRequest as the main entity and filtering on the selected Recruiment Sources. However, for the requisitions having more that one Recruitment Source, the export file has multiple records for the same requisition. Is there a way to prevent duplicated when exporting in XML format?