APA (7th ed.) Citation

Shaw, Z. (2016). Learn Ruby the Hard Way (1st edition.). Addison-Wesley Professional.

Chicago Style (17th ed.) Citation

Shaw, Zed. Learn Ruby the Hard Way. 1st edition. Addison-Wesley Professional, 2016.

MLA (9th ed.) Citation

Shaw, Zed. Learn Ruby the Hard Way. 1st edition. Addison-Wesley Professional, 2016.

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