Center, A. H., & Jackson, P. (1990). Public relations practices: Managerial case studies and problems (4th ed.). Prentice Hall Regents.
Cita Chicago Style (17a ed.)Center, Allen H., y Patrick Jackson. Public Relations Practices: Managerial Case Studies and Problems. 4th ed. New Jersey: Prentice Hall Regents, 1990.
Cita MLA (9a ed.)Center, Allen H., y Patrick Jackson. Public Relations Practices: Managerial Case Studies and Problems. 4th ed. Prentice Hall Regents, 1990.
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