APA (7th ed.) Citation

(1980). Formal language theory: Perspectives and open problems (1. print.). Acad. Press.

Chicago Style (17th ed.) Citation

Formal Language Theory: Perspectives and Open Problems. 1. print. New York [u.a.]: Acad. Press, 1980.

MLA (9th ed.) Citation

Formal Language Theory: Perspectives and Open Problems. 1. print. Acad. Press, 1980.