APA (7th ed.) Citation

3G E-Learning LLC, USA, & 3G E-Learning LLC, USA. (2020). Discrete Mathematics (2nd edition.). 3G E-earning LLC.

Chicago Style (17th ed.) Citation

3G E-Learning LLC, USA, and USA 3G E-Learning LLC. Discrete Mathematics. 2nd edition. New York, NY: 3G E-earning LLC, 2020.

MLA (9th ed.) Citation

3G E-Learning LLC, USA, and USA 3G E-Learning LLC. Discrete Mathematics. 2nd edition. 3G E-earning LLC, 2020.