Fukuzawa, Y., Dilworth, D. A., & Nishikawa, S. (2013). An encouragement of learning. Columbia University Press.

Fukuzawa, Yukichi, David A. Dilworth, and Shunsaku Nishikawa. An Encouragement of Learning. New York: Columbia University Press, 2013.

Fukuzawa, Yukichi, et al. An Encouragement of Learning. Columbia University Press, 2013.