Quoting Quotes
Attributed to Diogenes of Sinope in "Let a simile be your umbrella" by William Safire (p. 364), 2001.
"Life of Pompey". Book By Plutarch, transl. by John Dryden, 75 A.C.E..
"Encountering Directors". Book by Charles Samuels (1972, p. 15-32), July 29, 1969.
Laurell K. Hamilton (2011). “Laurell K. Hamilton's Anita Blake, Vampire Hunter collection 16-19”, p.1504, Penguin
There is always the option of being emotionally lazy, that is, of quoting.
Alain De Botton (1993). “Essays in Love”
Thomas Love Peacock (1856). “Maid Marian, and Crotchet Castle”, p.177
"Brush Up Your Shakespeare" (song) (1948)