Citazione Stile APA (7a Edizione)

Bird, S., Klein, E., & Loper, E. (2009). Natural language processing with Python (First edition.). O'Reilly.

Citazione stile Chigago Style (17a edizione)

Bird, Steven, Ewan Klein, e Edward Loper. Natural Language Processing with Python. First edition. Beijing ; Cambridge, Mass.: O'Reilly, 2009.

Citatione MLA (8a ed.)

Bird, Steven, et al. Natural Language Processing with Python. First edition. O'Reilly, 2009.