Perone, U. (2011). The possible present. State University of New York Press.
Lua i Stíl Chicago (17ú heag.)Perone, Ugo. The Possible Present. Albany: State University of New York Press, 2011.
Lua MLA (9ú heag.)Perone, Ugo. The Possible Present. State University of New York Press, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.