Cite Them Right 11th edition - Harvard

Bird, S., Klein, E. und Loper, E. (2009) Natural language processing with Python [book]. 1. ed. Beijing [u.a.]: O’Reilly.

Chicago Manual of Style 17th edition (full note)

Bird, Steven, Ewan Klein, und Edward Loper. Natural language processing with Python. Book. 1. ed. Beijing [u.a.]: O’Reilly, [2009?], Beijing [u.a.]: O’Reilly, [2009?].

American Psychological Association 7th edition

Bird, S., Klein, E., & Loper, E. (ca. 2009). Natural language processing with Python (1. ed.) [Book]. O’Reilly.

Modern Language Association 9th edition

Bird, S., E. Klein, und E. Loper. Natural language processing with Python. 1. ed., book, O’Reilly, 2009.

ISO-690 (author-date, Deutsch)

BIRD, Steven, Ewan KLEIN und Edward LOPER, 2009. Natural language processing with Python. 1. ed. Beijing [u.a.]: O’Reilly. ISBN 9780596516499

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.