Kant: From the book The Historian’s History of the World; Socrates: From the book A General History for Colleges and High Schools; Confucius: Sung Kyun Kwan University, Seoul, Korea
Confucius: Sung Kyun Kwan University ,‎ Seoul ,‎ Korea ‏; A General History for Colleges and High Schools Socrates: From the book ‏; The Historian’s History of the World Kant: From the book