Nagao, T., & Saitō, I. (2000). Kokology: The game of self-discovery. Simon & Schuster.
Chicago-čujuhus (17. p.)Nagao, Tadahiko, juo Isamu Saitō. Kokology: The Game of Self-discovery. New York: Simon & Schuster, 2000.
MLA-čujuhus (9. p.)Nagao, Tadahiko, juo Isamu Saitō. Kokology: The Game of Self-discovery. Simon & Schuster, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.