Albert Einstein (2013). “Einstein on Politics: His Private Thoughts and Public Stands on Nationalism, Zionism, War, Peace, and the Bomb”, p.232, Princeton University Press
Percy Bysshe Shelley (1821). “Queen Mab, a philosophical poem, with notes. [reputed to have been given by the author to W. Francis. Wanting the title-leaf, dedication and part of the last leaf].”, p.145