Cita APA (7th ed.)

Ginsburg, S., Greibach, S., & Hopcroft, J. E. (1969). Studies in abstract families of languages. American Mathematical Society.

Cita Chicago (17th ed.)

Ginsburg, Seymour, Sheila Greibach, i John E. Hopcroft. Studies in Abstract Families of Languages. Providence, Rhode Island: American Mathematical Society, 1969.

Cita MLA (9th ed.)

Ginsburg, Seymour, et al. Studies in Abstract Families of Languages. American Mathematical Society, 1969.