PATTERN: style of cause, neutral citation, pinpoint [if needed], judge [if needed].
EXAMPLE: Radonna Investments Ltd v Rubin, 2012 ONCA 321.
Let's examine each part of the citation for a case with a neutral citation to understand how it is constructed:
Example: Radonna Investments Ltd v Rubin
"Indexed as": for recent cases, an "indexed as" title will appear at the beginning of a case. If you are ever in doubt as to what the style of cause for a case should be, this is a useful bit of information. Check the first page of the judgment and if the case has an "indexed as" reference, use it for citation purposes.
Reference to the Crown: As an element of constitutional monarchy, Canadian executive government authority is formally vested in the Queen, hence the use of R for the Latin word for queen, regina, in legal citations. This is used mainly for criminal cases prosecuted by the state, although you may also see R as part of a citation for a civil case, in place of such terms as "The Queen", "The Queen in right of," etc.
Use the neutral citation as given by the court.
Example: Radonna Investments Ltd v Rubin, 2012 ONCA 321
Include a pinpoint if you are citing to a particular passage in the judgment. Since your case has a neutral citation, make sure you cite to the paragraph number.
Example: Radonna Investments Ltd v Rubin, 2012 ONCA 321 at para 2
If relevant, the judge's name may be included, followed by "J" for Justice, "JA" for Justice of Appeal, etc. (consult 3.10 of the McGill Guide).
Example: Radonna Investments Ltd v Rubin, 2012 ONCA 321 at para 2, LaForme JA.