APA (7th ed.) Citation

ScienceDirect (Online service) & Book, R. V. (1980). Formal language theory: Perspectives and open problems. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service) and Ronald V. Book. Formal Language Theory: Perspectives and Open Problems. New York: Academic Press, 1980.

MLA (9th ed.) Citation

ScienceDirect (Online service) and Ronald V. Book. Formal Language Theory: Perspectives and Open Problems. Academic Press, 1980.

Warning: These citations may not always be 100% accurate.