Book, R. V. (1980). Formal language theory: Perspectives and open problems. Academic Press.
Chicago Style (17th ed.) CitationBook, Ronald V. Formal Language Theory: Perspectives and Open Problems. New York, N.Y.: Academic Press, 1980.
MLA (9th ed.) CitationBook, Ronald V. Formal Language Theory: Perspectives and Open Problems. Academic Press, 1980.
Warning: These citations may not always be 100% accurate.