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SELECT UC.OWNER
  ,      UC.CONSTRAINT_NAME
  ,      UCC1.TABLE_NAME||'.'||UCC1.COLUMN_NAME "CONSTRAINT_SOURCE"
  ,      'REFERENCES'
  ,      UCC2.TABLE_NAME||'.'||UCC2.COLUMN_NAME "REFERENCES_COLUMN"
FROM USER_CONSTRAINTS uc
  ,    USER_CONS_COLUMNS ucc1
  ,    USER_CONS_COLUMNS ucc2
WHERE UC.CONSTRAINT_NAME = UCC1.CONSTRAINT_NAME
      AND UC.R_CONSTRAINT_NAME = UCC2.CONSTRAINT_NAME
      AND UCC1.POSITION = UCC2.POSITION -- Correction for multiple column primary keys.
      AND UC.CONSTRAINT_TYPE = 'R'
ORDER BY UCC1.TABLE_NAME
  ,        UC.CONSTRAINT_NAME;