APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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