Allin, D. H., & Kraus, S. (1994). Teenty Years Aspen Institute Berlin: [publ. by the Aspen Institute Berlin. Prepared by Susanne Kraus. Ed. by Dana H. Allin].

Allin, Dana H., and Susanne Kraus. Teenty Years Aspen Institute Berlin: [publ. by the Aspen Institute Berlin. Prepared by Susanne Kraus. Ed. by Dana H. Allin]. Berlin, 1994.

Allin, Dana H., and Susanne Kraus. Teenty Years Aspen Institute Berlin: [publ. by the Aspen Institute Berlin. Prepared by Susanne Kraus. Ed. by Dana H. Allin]. 1994.