Citazione Stile APA (7a Edizione)

Howard, C. (1979). Contact: A textbook in apllied communications (3rd.). Prentice Hall.

Citazione stile Chigago Style (17a edizione)

Howard, C. Contact: A Textbook in Apllied Communications. 3rd. New Jersey: Prentice Hall, 1979.

Citatione MLA (9a ed.)

Howard, C. Contact: A Textbook in Apllied Communications. 3rd. Prentice Hall, 1979.