Douglas Adams (2016). “Dirk Gently's Holistic Detective Agency Box Set: Dirk Gently's Holistic Detective Agency and The Long Dark Tea-Time of the Soul”, p.246, Simon and Schuster
"New Nationalism Speech". Theodore Roosevelt's speech at the Dedication of the John Brown Memorial Park in Osawatomie, Kansas, teachingamericanhistory.org. August 31, 1910.