Hawking, L., & Hawking, c. S. (2017). George e a lua azul (1ª.). Editorial Presença.
Lua i Stíl Chicago (17ú heag.)Hawking, Lucy, agus co-autor Stephen Hawking. George E a Lua Azul. 1ª. Editorial Presença, 2017.
Lua MLA (8ú heag.)Hawking, Lucy, agus co-autor Stephen Hawking. George E a Lua Azul. 1ª. Editorial Presença, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.