A paper is published in a book, conference and its proceedings, should I cite it as book, conference or conference proceeding paper? I use Mendeley reference manager and sometimes import articles from browser to my Mendeley Library using browser extension. Import is totally fine but I am having two confusions after importing:

Some conference papers are published in Springer Lecture Notes in Computer Science (LNCS) and many other related Lecture Notes series of Springer. When I add it to Mendeley, it categorizes that paper as &quot;Book&quot; although it was originally published in a conference. So should I cite this paper as

an article in a book titled LNCS or
Conference in which it was published or
Conference proceedings in which it was published?



Please refer to following image as an example of this. First screenshot is from Springer site and second is from Mendeley Desktop paper details section.



If I have to cite it as a Conference proceeding, then what should be name of the Conference Proceeding,

the name written as &quot;Proceedings of International Conference on XYZ&quot; or
the actual title of proceeding as &quot;XYZ&quot;?



Taking the above picture as an example: Here, the title of conference is &quot;International Conference on Human Centered Computing&quot; and Proceeding name is &quot;Human Center Computing&quot;. Should I refer title as &quot;Proceedings of International Conference on Human Centered Computing&quot; or just &quot;Human Centered Computing&quot;?

If that paper is Workshop paper of that conference, in this case, what would be citation style, workshop title, Conference title or proceedings title?

Please help me understand this. Thanks in anticipation.
PS Pardon me if all three of the above should be posted as separate questions but I think these all all related to one another like an IF/ELSE condition and may help in reaching a conclusion.
If you are writing a journal article, follow the journal's instructions.  If there are no instructions, imitate papers they have recently published.
If you are doing homework or writing a thesis, ask your professor.  Do not be surprised if they do not care.
So long as the paper is easy to find from the citation, any of these approaches is reasonable.