Cita APA

 Jurafsky, D. (2009).  Speech and language processing: An Introduction to natural language processing, computational linguistics and speech recognition.  Pearson Prentice Hall.

Chicago Style Citation

 Jurafsky, Dan.  Speech and Language Processing: An Introduction to Natural Language Processing, Computational Linguistics and Speech Recognition.  Pearson Prentice Hall, 2009.

Cita MLA

 Jurafsky, Dan.  Speech and Language Processing: An Introduction to Natural Language Processing, Computational Linguistics and Speech Recognition.  Pearson Prentice Hall, 2009.