Oldfield, R. C., & Marshall, J. C. (1968). Language: Selected readings. Penguin.
Cita Chicago (17th ed.)Oldfield, Richard Charles, i J. C. Marshall. Language: Selected Readings. [Harmondsworth]: Penguin, 1968.
Cita MLA (9th ed.)Oldfield, Richard Charles, i J. C. Marshall. Language: Selected Readings. Penguin, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.