how to export import from WE8ISO8859P9 to WE8ISO8859P1

Hi,

How can I export and import schemas from a DB that has NLS_CHARACTERSET = WE8ISO8859P9 , to another DB that has NLS_CHARACTERSET = WE8ISO8859P1 ?

Origin:

SELECT value$ FROM sys.props$ WHERE name = 'NLS_CHARACTERSET' ;

WE8ISO8859P9

Destination:

SELECT value$ FROM sys.props$ WHERE name = 'NLS_CHARACTERSET' ;

WE8ISO8859P1

My Version of DB is Oracle EE 11.2.0.4: origin and destination.

Thanks for your help.

David