Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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