APA (7th ed.) Citation

Hopcroft, J. E., & Ullman, J. D. (1977). Formal languages and their relation to automata (11. print.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Hopcroft, John E., and Jeffrey D. Ullman. Formal Languages and Their Relation to Automata. 11. print. Reading, Mass: Addison-Wesley, 1977.

MLA (9th ed.) Citation

Hopcroft, John E., and Jeffrey D. Ullman. Formal Languages and Their Relation to Automata. 11. print. Addison-Wesley, 1977.