The Canadian Guide to Uniform Legal Citation, 10th edition (aka "The McGill Guide") is the official citation style guide for legal materials in Canada.
Lederman Law Library's online Legal Citation Guide summarizes the McGill Guide rules for citing cases, statutes, and secondary sources. The guide includes an interactive legal citation tutorial.
Queen's Law Library also has print copies of the 10th edition of the McGill Guide available in the Reserves section (call no. KE259 .C36 2023).