This guide presents four legal styles:
There are Bluebook, Oscola and European Journal of International Law styles available for Zotero. There is also a Zotero style for the International Law Department style, which is not officially validated (and therefore is not in the style repository), but is available here.
Cardiff Index to Legal Abbreviations
Allows you to search for the meaning of abbreviations for English-language legal publications, from the British Isles, the Commonwealth and the United States, including those covering international and comparative law.