APA

Hays D. G., . (1967). Introduction to computational linguistics. New York: American Elsevier Pub. Co.

Chicago

Hays David G, . 1967. Introduction to computational linguistics. New York: American Elsevier Pub. Co.

Harvard

Hays D. G., . (1967). Introduction to computational linguistics. New York: American Elsevier Pub. Co.

MLA

Hays David G, . Introduction to computational linguistics. New York: American Elsevier Pub. Co. 1967.