APA (7th ed.) Citation

Ashley, W., & Krause, A. (2018). Foundations of PyGTK Development: GUI Creation with Python (2nd edition.). Apress.

Chicago Style (17th ed.) Citation

Ashley, W., and Andrew Krause. Foundations of PyGTK Development: GUI Creation with Python. 2nd edition. Apress, 2018.

MLA (9th ed.) Citation

Ashley, W., and Andrew Krause. Foundations of PyGTK Development: GUI Creation with Python. 2nd edition. Apress, 2018.

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