I am having a hard time creating citations for new literature.
I get a new work (either electronic or printed) and I want to incorporate its citation to my library by means of a citation file (no matter if .bib, .ris, or whatever). And then I spend a lot of time in Internet looking for an appropriate citation file.
Could you tell me a website or a method to get a complete citation file for any work? Thanks!
My known options are following (I tried to rank them based on completeness of entries):
Sadly, at those websites, I find quite incomplete citations, for example, ISBN, DOI, and publisher are often missing.

As has been explained elsewhere, you cannot rely on websites, so edits are necessary.
– user2768 May 14 '20 at 06:57