Crystal ,David. (1971). Linguisics. Penguin Books, England.
Chicago Edition CitationCrystal ,David. Linguisics. Penguin Books, England: Penguin Books, England, 1971.
Cita MLACrystal ,David. Linguisics. Penguin Books, England, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.