Referencing with the Oxford system
The Oxford reference system is often used in areas such as law, theology and history. It is sometimes referred to as the footnote system.
Guide from Umeå University
Here is a list of the most common source formats and examples and templates for references. Also, read what information should be in the footnote on the page when you write your text.
When you want to refer to a legal commentary that you have read via the database Juno, it may be easiest to refer to the printed book, even if you have read it online.