Ryan, P., Anastas, A., Gabri, R., & Sauerländer, K. (2011). Two Is Not a Number. Hatje Cantz Verlag.
Lua i Stíl Chicago (17ú heag.)Ryan, Paul, Ayreen Anastas, Rene Gabri, agus Katrin Sauerländer. Two Is Not a Number. Ostfildern: Hatje Cantz Verlag, 2011.
Lua MLA (8ú heag.)Ryan, Paul, et al. Two Is Not a Number. Hatje Cantz Verlag, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.