Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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