APA (7th ed.) Citation

Etherton, A. R. B. (1966). Mastering modern English: A certificate course. Longmans.

Chicago Style (17th ed.) Citation

Etherton, A. R. B. Mastering Modern English: A Certificate Course. London: Longmans, 1966.

MLA (9th ed.) Citation

Etherton, A. R. B. Mastering Modern English: A Certificate Course. Longmans, 1966.

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