Cita APA (7a ed.)

(1987). The formal complexity of natural language. D. Reidel Publishing Company.

Cita Chicago Style (17a ed.)

The Formal Complexity of Natural Language. Dordrecht [etc.]: D. Reidel Publishing Company, 1987.

Cita MLA (9a ed.)

The Formal Complexity of Natural Language. D. Reidel Publishing Company, 1987.