Shengold, L. (2014). The promise: Who is in charge of time and space? Karnac.
Lua i Stíl Chicago (17ú heag.)Shengold, Leonard. The Promise: Who Is in Charge of Time and Space? London, England: Karnac, 2014.
Lua MLA (9ú heag.)Shengold, Leonard. The Promise: Who Is in Charge of Time and Space? Karnac, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.