How do I cite one technical report from a project collection? My group are working individually on different aspects of the same research project. We will releasing our individual papers as technical reports.

It seems to be a common courtesy when publishing a paper to include your own citation. How do you cite a technical report so that it is clear that it is part of a collection (a single project)?

I was thinking of filling in the project name in the "journal" field so it would end up something like:

Surname, N. (2015) "My Paper" in Our Project, Article 4


But that seems to be abusing the semantics of the journal field. Is there a standard way to do this?
Some departments or institutes have their own technical report series that are published online much like a journal. If yours is like this, then you should be able to come up with a citation format that reflects it. How are your tech reports published and archived?