What to select for "type of source" for a paper in Microsoft Word? I am currently doing my very first paper at university and am a bit lost with Word’s citation system.
What does a scientific paper (more specifically this one) classify as when it comes to “type of source” in Word?



This probably is a very simple question, but I am really having trouble finding an answer.
Here’s an explanation of my thought process:


It is certainly not a book nor a book section.
I don’t feel like it would count as an article in a journal or peridocal as from my understanding research papers are published as a stand-alone?
Conference Proceeding: I have no idea what that is, but I think it isn’t it.
Maybe a report? As it reports on findings that were made ... but I feel this is also not quite right ...
It is not a website.
I might use document from website, however this paper is available on several websites (at least through my Google Scholar search) that seem to have picked it up, however it was not originally published through them from what I can tell.
While I have it as a PDF, I don't think that is meant by **electronic source.*
Art: no
Sound Recording: no
Performance: no
Film: no
Interview: no
Patent: no
I have no idea what is meant by case. As in a lawsuit?
Misc is what I will pick for now, but I guess citing research papers in a scientific work isn’t something happening so seldomly that one would have to resort to misc.
The paper you link is not a journal article. It's published as part of a conference proceedings.

You can find the complete proceedings in which that paper appears here (link is to the SPIE page for the 1994 conference Telemanipulators and Telepresence Technologies).

To address some other points in your question, I cannot think of a legitimate research paper that was not published in a journal or conference. Publishing in this sense means putting the paper through peer review, an essential part of contributing to the literature if you want your work to be taken seriously. 

Furthermore, conference proceedings are exactly what it says on the tin: proceedings (i.e. talks) from a conference that have been written up and published. Publishing in this way is more common in some fields than others, for example, in computer science, just like the paper you linked.