Citazione Stile APA (7a Edizione)

3G E-learning LLC, USA. (2019). Environmental issues: Global warming. 3G E-learning LLC.

Citazione stile Chigago Style (17a edizione)

3G E-learning LLC, USA. Environmental Issues: Global Warming. New York, NY: 3G E-learning LLC, 2019.

Citatione MLA (9a ed.)

3G E-learning LLC, USA. Environmental Issues: Global Warming. 3G E-learning LLC, 2019.