BEAZLEY, David M., 2009. Python : essential reference. 4 th ed. [United States?]: Addison-Wesley Professional. ISBN 9780768687040.
Elsevier - Harvard (with titles)Beazley, D.M., 2009. Python : essential reference, 4 th ed. ed, Safari Books Online. Addison-Wesley Professional, [United States?].
American Psychological Association 7th editionBeazley, D. M. (ca. 2009). Python : essential reference [Cd]. In Safari Books Online (4 th ed). Addison-Wesley Professional.
Springer - Basic (author-date)Beazley DM (2009) Python : essential reference, 4 th ed. Addison-Wesley Professional, [United States?]
Juristische Zitierweise (Stüber) (Deutsch)Beazley, David M., Python : essential reference, 4 th ed , [United States?] 2009.
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