APA (7th ed.) Citation

Clarke, W., & Mackenzie, M. M. (1973). Modern english practice. Longman.

Chicago Style (17th ed.) Citation

Clarke, Waldo, and M.D. Munro Mackenzie. Modern English Practice. Harlow: Longman, 1973.

MLA (9th ed.) Citation

Clarke, Waldo, and M.D. Munro Mackenzie. Modern English Practice. Longman, 1973.