APA (7th ed.) Citation

Powers, D. M. W., & Turk, C. (1989). Machine Learning of Natural Language. Springer London.

Chicago Style (17th ed.) Citation

Powers, David M. W., and Christopher Turk. Machine Learning of Natural Language. London: Springer London, 1989.

MLA (9th ed.) Citation

Powers, David M. W., and Christopher Turk. Machine Learning of Natural Language. Springer London, 1989.