Cita APA (7th ed.)
Cunningham William P. & Cunningham Mary Ann. (2015). Environmental Science: A global concern (13 th ed.). Mcgraw Hill Education (India).
Cita Chicago (17th ed.)
Cunningham William P. i Cunningham Mary Ann. Environmental Science: A Global Concern. 13 th ed. New Delhi: Mcgraw Hill Education (India), 2015.
Cita MLA (9th ed.)
Cunningham William P. i Cunningham Mary Ann. Environmental Science: A Global Concern. 13 th ed. Mcgraw Hill Education (India), 2015.
Atenció: Aquestes cites poden no estar 100% correctes.