Entry preview standard style plain

My document’s references are in Patashnik’s standard style “plain”. I’m looking for a journal style in “entry preview”, that match style “plain”.

Hello,

either you directly edit the preview style in JabRef or you have a look at the CSL citations styles library.
http://editor.citationstyles.org/about/

To edit a style in JabRef you can take a look here:
http://help.jabref.org/en/Preview

Regards and Merry Christmas
Christoph