Tolong jelaskan mengenai Sources dari Ren (Kong Hu Cu)

Chi-Yun, Chang. A Life of Confucius. Hwakang Press, Taipei 171.

Do-Dinh, Pierre. Confucius and Chinese Humanism. Funk & Wagnalls, New York. 1969.

Dubs H, Homer. "The Development of Altruism in Confucianism" Apr. 1951: 48-55 JSTOR Oxford University.

Hopfe M, Lewis and Woodward R. Mark. Religions of the World. Pearson Education Inc: Upper Saddle River, New Jersey, 07458.

Kong Qiu, lu. "Lun Yu", 5th century.