APA-referens (7:e uppl.)

RAUM ELIZABETH. (2019). THE HISTORY OF TELEPHONE (2018 Ed.). HEINEMANN LIBRARY.

Chicago-referens (17:e uppl.)

RAUM ELIZABETH. THE HISTORY OF TELEPHONE. 2018 Ed. MINNESOTA: HEINEMANN LIBRARY, 2019.

MLA-referens (9:e uppl.)

RAUM ELIZABETH. THE HISTORY OF TELEPHONE. 2018 Ed. HEINEMANN LIBRARY, 2019.