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• ı. Edwin Emery, The Press and America: An İnterpretatire History of Journalism (New York: Prentice-Hall, 2d. ed., 1965), p. 98
• 2. Theodore Peterson, Jay W.Jensen, and William Rivers, The Mass Media and modern society (New York: Holt, Richard X Winston, 1965), p.49
• 3. 1 bid., pp. 50-51
• 4. 1 bid., p.27
• 5. 1 bid., p.55