Yesterday I got the question of how to refer to something that is behind a login. It could be a document or webpage that is not available to everyone. This can of course lead to difficulties for the person checking your references.
This may include documents / information in an intranet, a presentation of some sort that you got from a person, for example, someone you interviewed for the assignment, or a checklist for environmental certification of a company as was the case yesterday. For this type of material you use the phrase [unpublished manuscript] or other appropriate phrase like [PowerPoint presentation] or [checklist for environmental certification] after the title of the document.
The reference in yesterday’s case, would look something like this:
Author / Editor, (Year) Title [checklist environmental certification] Location: Company / Organization
Text: Lisa Carlson