Strauss, F. J., Fox, H., & Schreiber, J. J. S. (1970). Challenge and response: A programme for Europe. New York: Atheneum.
Παραπομπή Chicago StyleStrauss, Franz Josef, Henry Fox, and Jean Jacques Servan Schreiber. Challenge and Response: A Programme for Europe. New York: Atheneum, 1970.
Παραπομπή MLAStrauss, Franz Josef, Henry Fox, and Jean Jacques Servan Schreiber. Challenge and Response: A Programme for Europe. New York: Atheneum, 1970.
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