/ˌənəˈfɪʃəl ˌsaɪˈteɪʃən/ – Phrase
Definition: viện dẫn nguồn tư liệu không chính thức.
A more throughout explanation: An unofficial citation refers to a reference to a legal authority or source that is not officially recognized or accepted by a court or legal system. It may be used informally in legal discussions or academic writing, but it does not carry the same weight or authority as an official citation from a recognized legal source.
Example: The attorney submitted an unofficial citation of a relevant case law to support their argument in court.