A working paper or a discussion paper or something else? I have some papers from google which I don't know to what type they belong: a working paper or a discussion paper or something else? I need this for my bibliography

Below are some examples of such cases.

The first one has an abbreviation JEL Classifications, but is this enough to refer this to Journal of Economic Literature?

The second one has nothing at all.

Can someone give me a hint? Any help would be appreciated!
JEL classifications are just that: classifications. Anyone can put such a classification on his paper, and it doesn't have anything to do with publishing in the JEL - it's more like a keyword.

To your question: I don't think there really is such a big difference between a working paper (which is work in progress, typically distributed to be discussed) and a discussion paper (which is work in progress, typically distributed to be discussed). All of these are essentially manuscripts under preparation for submission to a refereed journal (in CS, a conference). So I would file all of these under "non-reviewed papers".