APA-čujuhus (7. p.)

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

Chicago-čujuhus (17. p.)

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

MLA-čujuhus (9. p.)

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

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