Gidley Jennifer M. (2017). Future: Very Short Introduction. Oxford Uty Press.
Lua i Stíl Chicago (17ú heag.)Gidley Jennifer M. Future: Very Short Introduction. Oxford Uty Press, 2017.
Lua MLA (9ú heag.)Gidley Jennifer M. Future: Very Short Introduction. Oxford Uty Press, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.