Keith Haring - Keith Haring a Milano, Mostra di Salvatore Ala

<p>M.Gundel, <i>Keith Haring: Short Messages Posters</i>, ed. Prestel Munich-New York 2003, p. 10 e n°14 p. 88;</p><p>J.Döring, C. von der Osten <i>Keith Haring: Posters,</i> ed. Prestel Munich-New York 2017 p. 18 e n°18 p. 109<br></p>