In order for Zotero to produce accurate citations and bibliographies, it is extremely important that you ensure that each item is given complete and accurate metadata in Zotero, including classifying each as the correct item type. Often this will require manual edits. If Zotero contains incomplete or inaccurate information, your citations will be inaccurate.
How do I fix the title?
After importing your references into Zotero, be sure to right-click on the title and Transform Text to Sentence case. Fix any capitalization after punctuation. This will help when generating reference lists.
Use the Report type for PDFs.
If you are citing a standalone report that is a PDF, change the item type to Report.
It's easy to attach files (like PDFs) to items in your Zotero library. Just drag the file into your Zotero client. Dropping a file onto a collection, or in between library items, will copy it into your library as a standalone item. Dropping it onto an existing item will attach it to that item. This is the easiest way to attach a copy of an article to its entry in your library.
Another way to add an attachment is to first select the item in your library, then click the attachments icon , then select Attach Stored Copy of File. This will attach the PDF to the item and store it in your Zotero library.