Cita APA (7th ed.)

British Broadcasting Corporation & Peck, A. (1977). Kontakte. Notes for teachers. Units 1-25 (2nd ed.). British Broadcasting Corporation.

Cita Chicago (17th ed.)

British Broadcasting Corporation i Antony Peck. Kontakte. Notes for Teachers. Units 1-25. 2nd ed. London: British Broadcasting Corporation, 1977.

Cita MLA (8th ed.)

British Broadcasting Corporation i Antony Peck. Kontakte. Notes for Teachers. Units 1-25. 2nd ed. British Broadcasting Corporation, 1977.