Recommend Oracle Reference for Reorg Tables & Tablespaces?

I am looking for a reference to identify the tasks and scripts involved in reorging 1) tables and 2) tablespaces. Many of the tables have RI and several I would like to move to another tablespace.

Thanks for your help.

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When I said, "My foot is slipping," your love, O Lord, supported me.
When anxiety was great within me, your consolation brought joy to my
soul.
  Psalm 94:18-19, NIV
                <IXOYE><
                       John 3:16


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