The English word "reference" is also used in the context of conflict of laws such as when one country's conflicts rules "refer" to the laws of another country for purposes of apply that foreign law to the case at hand.
There are multiple definitions - click on the translation that matches your context.
(also: letter of reference/reference letter) a letter containing information about you and written by someone who knows you well, especially one to be sent to a potential employer, university or landlord etc
A good character reference letter helped her get employment.
a mention of something in a speech, a piece of writing or an artistic work etc
We should normally avoid references to commercial products.
a letter in which an employer, former employer, teacher, professor, or other authority figure recommends an employee to a potential future employer for a new job
She asked her college tutor for a reference with regard to employment.