There are more ways to access case law than listed below. The listed sources are the Bluebook preferred (see Table 2, pp472-88) that are accessible in the library, via electronic subscription resources for students and faculty, or for free online.[i] The years below indicate the coverage of the source material available.
[i] The Bluebook: A Uniform System of Citation 472-88 tbl.T.2 (Columbia Law Review Ass’n et al. eds. 20th ed. 2015).
The official Law Reports are the preferred reporters for all jurisdictions. The full title of the Law Reports depends on the court cases you are looking for. Law Reports Appeals Cases contain decisions from the Judicial Committee of the Privy Council, the Supreme Court, and the House of Lords (cases before 2005). Current Law Reports also include Queen’s Bench Division, Chancery, and Family. Because these are the preferred reporters, search here first before moving on. (date of coverage depends on the series title; see Bluebook Table 2, pp482-483)
Prior to 1865
Court of Session
High Court of Justiciary
Please note that the cases that can be found on WestlawNext have scans of the cases as printed in their official reporters, which makes them an official source for the purposes of the Bluebook.