APA-ийн эшлэл(7 дахь хэвлэлт)

Perkins, J. (2010). Python text processing with NLTK 2.0 cookbook: Over 80 practical recipes for using Python's NLTK suite of libraries to maximize your natural language processing capabilities. Packt Pub..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Perkins, Jacob. Python Text Processing with NLTK 2.0 Cookbook: Over 80 Practical Recipes for Using Python's NLTK Suite of Libraries to Maximize Your Natural Language Processing Capabilities. Birmingham, U.K.: Packt Pub., 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Perkins, Jacob. Python Text Processing with NLTK 2.0 Cookbook: Over 80 Practical Recipes for Using Python's NLTK Suite of Libraries to Maximize Your Natural Language Processing Capabilities. Packt Pub., 2010.