APA (7th ed.) Citation

Hays, D. G. (1967). Introduction to computational linguistics. American Elsevier Pub.

Chicago Style (17th ed.) Citation

Hays, David G. Introduction to Computational Linguistics. New York: American Elsevier Pub, 1967.

MLA (9th ed.) Citation

Hays, David G. Introduction to Computational Linguistics. American Elsevier Pub, 1967.