Adriani, G., Matzner, F., Grasskamp, W., & Spies, W. (2000). Ben Willikens: Spazi negli spazi ; Räume in Räumen ; Palazzo Pitti. Hatje Cantz.
Lua i Stíl Chicago (17ú heag.)Adriani, Götz, Florian Matzner, Walter Grasskamp, agus Werner Spies. Ben Willikens: Spazi Negli Spazi ; Räume in Räumen ; Palazzo Pitti. Ostfildern-Ruit: Hatje Cantz, 2000.
Lua MLA (8ú heag.)Adriani, Götz, et al. Ben Willikens: Spazi Negli Spazi ; Räume in Räumen ; Palazzo Pitti. Hatje Cantz, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.