Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.32, St. Martin's Press
Dr. Robert C. Worstell, Dorothea Brande, Eark Nightingale, Claude M. Bristol, Napoleon Hill (2017). “Mindset StackingTM Inspirational Journal VolumeSS02”, p.6, Lulu.com
Quoted in People, 26 Dec. 1977. Although now associated with Tomlin, this saying appears anonymously in Robert Reisner, Graffiti (1971), in the form "Remember, even if you win the rat race - you're still a rat." Rosalie Maggio, in New Beacon Book of Quotations by Women, states that William Sloane Coffin said "Even if you win the rat-race, you're still a rat" as a chaplain at Williams College or Yale University in the 1950s or 1960s.
Albert Einstein (2013). “Einstein on Politics: His Private Thoughts and Public Stands on Nationalism, Zionism, War, Peace, and the Bomb”, p.228, Princeton University Press
graf Leo Tolstoy, Constance Garnett, David Taffel (2005). “The Kingdom of God is Within You: Christianity Not as a Mystic Religion But as a New Theory of Life”, p.45, Barnes & Noble Publishing