"Deutschland Heiraten, 1558-1929," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/J4BS-NT5 : 11 February 2018), Johann Stephan Eck in entry for Johann Jacob Apffel and Catharina Elisabetha Eckin, 24 Sep 1754; citing Evangelisch, Landau In Pfalz Stadt, Pfalz, Bavaria; FHL microfilm 488,355. - Johann Stephan Eck en tant qu’entrée de Johann Jacob Apffel et de Catharina Elisabetha Eckin, "Deutschland Heiraten, 1558-1929"
https://familysearch.org/ark:/61903/1:1:J4BS-NT5