- FamilySear
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Willem Petrus Joubert, person ID M227-VZC.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Willem Adriaan Joubert, person ID LZKN-QZT.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">
- FamilySear
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Willem Petrus Joubert, person ID M227-VZC.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Willem Adriaan Joubert, person ID LZKN-QZT.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">