Cita APA (7th ed.)

Center, A. H., & Jackson, P. (1990). Public relations practices: Managerial case studies and problems (4th ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Center, Allen H., i Patrick Jackson. Public Relations Practices: Managerial Case Studies and Problems. 4th ed. Englewood Cliffs, N.J: Prentice-Hall, 1990.

Cita MLA (9th ed.)

Center, Allen H., i Patrick Jackson. Public Relations Practices: Managerial Case Studies and Problems. 4th ed. Prentice-Hall, 1990.