APA (7th ed.) Citation

Barry, P., & Griffiths, D. (2009). Head first programming: [a learner's guide to programming using the Python language]. O'Reilly.

Chicago Style (17th ed.) Citation

Barry, Paul, and David Griffiths. Head First Programming: [a Learner's Guide to Programming Using the Python Language]. Sebastopol, CA: O'Reilly, 2009.

MLA (9th ed.) Citation

Barry, Paul, and David Griffiths. Head First Programming: [a Learner's Guide to Programming Using the Python Language]. O'Reilly, 2009.

Warning: These citations may not always be 100% accurate.