hey,
im currently working on my bachelors thesis.
my bibliography includes many pdf files, wich if added throug the zotero add-on for firefox, do not get many informations automatically added (creator, date, mandatory DOI, etc.) and i´m not able to add any informations manually.
in my word document citations will appear as "source xy, no date" and in the references at the back of the document its the same problem.

How do i manually add information on documents in my zotero bibliography?

thanks in advance