Ingpen, R., & Wilkinson, P. (1993). Encyclopedia of ideas that changed the world: The greatest discoveries and inventions of human history (First American edition.). Viking.
Chicago Style (17th ed.) CitationIngpen, Robert, and Philip Wilkinson. Encyclopedia of Ideas That Changed the World: The Greatest Discoveries and Inventions of Human History. First American edition. New York: Viking, 1993.
MLA (8th ed.) CitationIngpen, Robert, and Philip Wilkinson. Encyclopedia of Ideas That Changed the World: The Greatest Discoveries and Inventions of Human History. First American edition. Viking, 1993.
Warning: These citations may not always be 100% accurate.