When you take stuff from one author, it's plagiarism; if you take it from many writers, it's research.
Source: In Instant Quotation Dictionary, by Donald O. Bolander, 1979.
-- Wilson Mizner, (May 19 1876-1933), US playwright, author; He was noted for The Only Law, 1909; The Deep Purple, 1910; and The Greyhound, 1912.