Cita APA (7a ed.)

Matthews Kelli. (2009). Principles of public relations. Mcgraw -hill.

Cita Chicago Style (17a ed.)

Matthews Kelli. Principles of Public Relations. New Delhi: Mcgraw -hill, 2009.

Cita MLA (9a ed.)

Matthews Kelli. Principles of Public Relations. Mcgraw -hill, 2009.