Mulas, U., & Haring, K. (1990). Ugo Mulas / Germano Celant. Rizzoli.
Lua i Stíl Chicago (17ú heag.)Mulas, Ugo, agus Keith Haring. Ugo Mulas / Germano Celant. New York: Rizzoli, 1990.
Lua MLA (8ú heag.)Mulas, Ugo, agus Keith Haring. Ugo Mulas / Germano Celant. Rizzoli, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.