APA-referens (7:e uppl.)

Blake, R. (2002). Electronic Communication systems (2.). Cengage Learning.

Chicago-referens (17:e uppl.)

Blake, Roy. Electronic Communication Systems. 2. Delmar: Cengage Learning, 2002.

MLA-referens (9:e uppl.)

Blake, Roy. Electronic Communication Systems. 2. Cengage Learning, 2002.