reference
The Italian word 'riferimento' is used in a similar way to the English word 'reference'. It can refer to a source of information or a point of contact, such as a person or a document. It can also be used to describe a mention or allusion to something or someone. In a sentence, it might look like: 'Il riferimento alla tua ricerca è il libro di testo.' (The reference for your research is the textbook.)
I refer to your previous words.
In this sentence, the speaker is indicating a reference to the words that the person they are speaking to previously said. This could be used in a variety of contexts, including arguments or discussions where the speaker wants to recall something the other person mentioned earlier.
Can I have the reference number for the booking?
This sentence is typical in a scenario while booking a hotel room or an air ticket or a table at a restaurant. The speaker is asking for the 'reference number', which is a unique identifier for their specific booking.
The document refers to an unresolved problem.
In this example, the speaker is indicating that a document mentions or refers to an issue that has yet to be resolved. This could be in a work setting, such as a progress report, or maybe a scientific research paper that mentions an unresolved problem as part of its content.