APA (7th ed.) Citation

Davies, A. (1990). Principles of language testing. B. Blackwell.

Chicago Style (17th ed.) Citation

Davies, Alan. Principles of Language Testing. Oxford, UK: B. Blackwell, 1990.

MLA (9th ed.) Citation

Davies, Alan. Principles of Language Testing. B. Blackwell, 1990.

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