APA (7th ed.) Citation

Greenbaum, S. (1985). The English language today. Pergamon Press.

Chicago Style (17th ed.) Citation

Greenbaum, Sidney. The English Language Today. Oxford: Pergamon Press, 1985.

MLA (8th ed.) Citation

Greenbaum, Sidney. The English Language Today. Pergamon Press, 1985.

Warning: These citations may not always be 100% accurate.