Cita APA (7th ed.)

Center H. Allen & Jackson Patrick. (2003). Public Relations Practices. Printice Hall of India.

Cita Chicago (17th ed.)

Center H. Allen i Jackson Patrick. Public Relations Practices. New Delhi: Printice Hall of India, 2003.

Cita MLA (9th ed.)

Center H. Allen i Jackson Patrick. Public Relations Practices. Printice Hall of India, 2003.