Cite cases from other jurisdictions as they are cited in their own jurisdiction, but with minimal punctuation. If the name of the law report series cited does not itself indicate the court, and the identity of the court is not obvious from the context, you should also give this in either full or short form in brackets at the end of the citation.
When citing a decision of the highest court of a US state, the abbreviation of the name of the state suffices.
Cite legislation from other jurisdictions as it is cited in its own jurisdiction, but without any full stops in abbreviations. Give the jurisdiction if necessary.