BIRD, Steven, KLEIN, Ewan und LOPER, Edward, 2009. Natural language processing with Python : "Analyzing text with the natural language toolkit"--Cover. Beijing: O’Reilly. ISBN 9780596803346.
Elsevier - Harvard (with titles)Bird, S., Klein, E., Loper, E., 2009. Natural language processing with Python : "Analyzing text with the natural language toolkit"--Cover, Safari Books Online. O’Reilly, Beijing.
American Psychological Association 7th editionBird, S., Klein, E., & Loper, E. (ca. 2009). Natural language processing with Python : "Analyzing text with the natural language toolkit"--Cover [Cd]. In Safari Books Online. O’Reilly.
Springer - Basic (author-date)Bird S, Klein E, Loper E (2009) Natural language processing with Python : "Analyzing text with the natural language toolkit"--Cover. O’Reilly, Beijing
Juristische Zitierweise (Stüber) (Deutsch)Bird, Steven/ Klein, Ewan/ Loper, Edward, Natural language processing with Python : "Analyzing text with the natural language toolkit"--Cover, Beijing 2009.