A quotation 's the repetition of one expression as part of another one, particularly when the quoted expression's well-known or explicitly attributed (as by citation) to its original source. A quotation can also refer to the repeated use of units of any other form of expression, especially parts of artistic works: elements of a painting, scenes from a movie or sections from a musical composition. The rest of this article addresses only written or oral quotations. Reasons for using quotations Qu… (More on Quotation)