APA (7th ed.) Citation

Perkins, D. C. (1979). English language. Celtic Revision Aids.

Chicago Style (17th ed.) Citation

Perkins, Derek C. English Language. Sunbury on Thames: Celtic Revision Aids, 1979.

MLA (9th ed.) Citation

Perkins, Derek C. English Language. Celtic Revision Aids, 1979.

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