Cita APA (7a ed.)
Cunningham William P. & Cunningham Mary Ann. (2015). Environmental Science: A global concern (13 th ed.). Mcgraw Hill Education (India).
Cita Chicago Style (17a ed.)
Cunningham William P. y Cunningham Mary Ann. Environmental Science: A Global Concern. 13 th ed. New Delhi: Mcgraw Hill Education (India), 2015.
Cita MLA (9a ed.)
Cunningham William P. y Cunningham Mary Ann. Environmental Science: A Global Concern. 13 th ed. Mcgraw Hill Education (India), 2015.
Precaución: Estas citas no son 100% exactas.