In articles that cover multiple jurisdictions, aim to provide an international overview. Keep in mind that there are several types of legal system (e.g., civil law, sharia law, common law, customary law). Within a given legal system, the law may have evolved in divergent ways. Because the law differs between jurisdictions, make clear what jurisdiction you are writing about. Try to incorporate a comparative perspective, if possible and appropriate.
In article text (for citations, see below), the first mention of a case should normally be formatted as A v. B. Cases from some jurisdictions, particularly those within the United Kingdom, use A v B. When referred to a second or third time within a section, cases may be referred to as A, or, if A does not disambiguate (e.g. Rex), B.
Cite to legal materials (constitutions, statutes, legislative history, administrative regulations, and cases) according to the generally accepted citation style for the relevant jurisdictions. If multiple citation styles are acceptable in a given jurisdiction, any may be used, but be consistent, and consider using the most common. Also consider using the citation style used in secondary sources rather than the citation style used by legal briefs or decisions.
The following guidelines will be generally useful in many jurisdictions:
Where both primary and secondary sources are available, one should cite both. While primary sources are more "accurate", secondary sources provide more context and are easier on the layperson. Where primary and secondary sources conflict factually, the primary source should be given priority.