
Quote in Looking at Dada, eds. Sarah Ganz Blythe & Edward D. Powers - The Museum of Modern Art New York, ISBN: 087070-705-1; p. 41
Duchamp is looking back shortly before his death in 1968
1951 - 1968
long quote from Duchamp's letter to his sister Suzanne Duchamp, New York, c. 15 Jan. 1916; as quoted in The Duchamp Book, ed. Gavin Parkinson, Tate Publishing, London 2008 pp. 157-158
1915 - 1925
Quote in Looking at Dada, eds. Sarah Ganz Blythe & Edward D. Powers - The Museum of Modern Art New York, ISBN: 087070-705-1; p. 41
Duchamp is looking back shortly before his death in 1968
1951 - 1968
as quoted in Joseph Beuys and the Celtic Wor(l)d: A Language of Healing, by Victoria Walters, LIT Verlag Münster, 2012, p. 206
Quotes after 1984, posthumous published
2001 - 2010, Isa Genzken in conversation with Wolfgang Tillmans' (2003)
Source: 1940s, I is Style (2000), p. 48 : in a letter to Edgar Kaufmann, 16 July 1946
Source: Art is no longer justifiable or setting the record straight, 2000, p. 66
Quote in an interview with , 1986; republished in: Joseph Beuys, Carin Kuoni. Joseph Beuys in America: Energy Plan for the Western Man. New York, 1993.pp. 169-170
Beuys refers in his quote to the so-called 'Silence of Marcel Duchamp', the period that Duchamp stopped creating art
1980's