APA (7th ed.) Citation

Helmke, M. (2020). Ubuntu Linux Unleashed 2021 Edition, 14th Edition (1st edition.). Addison-Wesley Professional.

Chicago Style (17th ed.) Citation

Helmke, Matthew. Ubuntu Linux Unleashed 2021 Edition, 14th Edition. 1st edition. Addison-Wesley Professional, 2020.

MLA (9th ed.) Citation

Helmke, Matthew. Ubuntu Linux Unleashed 2021 Edition, 14th Edition. 1st edition. Addison-Wesley Professional, 2020.

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