APA (7th ed.) Citation

Black, D. A., & Leo, J. (2019). The well-grounded Rubyist (Third edition.). Manning.

Chicago Style (17th ed.) Citation

Black, David A., and Joseph Leo. The Well-grounded Rubyist. Third edition. Shelter Island, NY: Manning, 2019.

MLA (9th ed.) Citation

Black, David A., and Joseph Leo. The Well-grounded Rubyist. Third edition. Manning, 2019.