APA (7th ed.) Citation

Barton, G. E., Berwick, R. C., & Ristad, E. S. (1987). Computational complexity and natural language. MIT.

Chicago Style (17th ed.) Citation

Barton, G. Edward, Robert C. Berwick, and Eric Sven Ristad. Computational Complexity and Natural Language. Cambridge (Massachusetts) [etc.]: MIT, 1987.

MLA (9th ed.) Citation

Barton, G. Edward, et al. Computational Complexity and Natural Language. MIT, 1987.