The term 'mention as a reference' can be summarized by the crossword solution 'CITE, ' which is a four-letter word. To CITE something means to refer to it as a source of information, usually in an academic or professional context. It is often used to back up a claim or argument with evidence from a reliable source. Citing sources is an important part of academic writing and research, as it allows readers to verify the accuracy of the information presented.