APA-referens (7:e uppl.)

Andrew Davis; Garrett Nagle. (2017). Environmental Systems and Societies IB Diploma Study Revision Gui: Second edition (2nd.). Hodder Education.

Chicago-referens (17:e uppl.)

Andrew Davis; Garrett Nagle. Environmental Systems and Societies IB Diploma Study Revision Gui: Second Edition. 2nd. Hodder Education, 2017.

MLA-referens (9:e uppl.)

Andrew Davis; Garrett Nagle. Environmental Systems and Societies IB Diploma Study Revision Gui: Second Edition. 2nd. Hodder Education, 2017.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.