Pusch, M. D., Editor (1979). One way-two way communication. Multicultural education: A cross-cultural training approach (pp. 155-159). Intercultural Network, Inc.

The oldest source we can locate for this activity is:

Artman, R. (1976). The Miami intercultural communication workshop. In D.S.  Hoopes (ed.) Readings in intercultural communication, volume 5. Regional Council for International Education.

Rich Artman modified the activity for his chapter but he does not have the original version.