APA-referens (7:e uppl.)

ROY, N. (2004). HOW IT WORKS THE TELEPHONE (REPRINTED.). A CBT PUBLICATION.

Chicago-referens (17:e uppl.)

ROY, NAVKALA. HOW IT WORKS THE TELEPHONE. REPRINTED. NEW DELHI: A CBT PUBLICATION, 2004.

MLA-referens (9:e uppl.)

ROY, NAVKALA. HOW IT WORKS THE TELEPHONE. REPRINTED. A CBT PUBLICATION, 2004.