Summerfield, M. (2009). Programming in Python 3: A complete introduction to the Python language. Addison-Wesley.
Chicago-viite (17. p.)Summerfield, Mark. Programming in Python 3: A Complete Introduction to the Python Language. Upper Saddle River, NJ : New Delhi ; Pearson Education: Addison-Wesley, 2009.
MLA-viite (8. p.)Summerfield, Mark. Programming in Python 3: A Complete Introduction to the Python Language. Addison-Wesley, 2009.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.