APA (7th ed.) Citation

Book, R. V., & Greibach, S. A. (1973). Formal Languages.

Chicago Style (17th ed.) Citation

Book, Ronald V., and Sheila A. Greibach. Formal Languages. 1973.

MLA (8th ed.) Citation

Book, Ronald V., and Sheila A. Greibach. Formal Languages. 1973.

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