These are the law itself. It can be found within legislation, the common law and within cases (particularly those that have set a precedent).
Cases and legislation can be found both in print and online (via LexisNexis, Juta, Sabinet). The common law derives from both English law as well as Roman Dutch law - this can be found in the commentaries of the authorities - found in print.
This is commentary on the law. Usually found in opinion pieces by legal authority figures such as journal articles or books. Journal articles can be accessed electronically using the UCT e-Journal portal and books can be found using the UCT Aleph catalogue.