Since I think Geneteka might give a misimpression, I would simply translate it for citation as Polish Genealogical Society and then give the specifics on the document being cited (parish register with name and date). You could also create a link to the specific data. To do that, in edit mode, use brackets like this [
https://whateveritis.genealodzy.pl Title of Document]. Put a space between the URL and the name you are using for the document.