APA (7th ed.) Citation

Davidson, G. W., Seaton, M. A., & Simpson, J. (1985). Chambers concise 20th century dictionary. Chambers.

Chicago Style (17th ed.) Citation

Davidson, G. W., M. A. Seaton, and John Simpson. Chambers Concise 20th Century Dictionary. Edinburgh: Chambers, 1985.

MLA (9th ed.) Citation

Davidson, G. W., et al. Chambers Concise 20th Century Dictionary. Chambers, 1985.