Zotero is the recommended reference management software for Law. It's only possible to export certain types of reference from legal databases, however, so please note the following:
The preferred citation style for legal references is the Oxford Standard Oxford University Standard for Citation of Legal Authorities (OSCOLA).
There are three OSCOLA styles in the Zotero Style Repository. Students should use the first one on the list and not the 'no ibid' style or the 'University of York' style.
You can drag-and-drop PDF files into 'My Library' in Zotero and if you have checked the 'Automatically retrieve metadata for PDFs' option in Zotero preferences, Zotero will find the metadata and create a bibliographic reference for the PDF.