APA Style

DAVIS, A., NAGLE, G. (2017). Environmental Systems and Societies for the IB Diploma Study and Revision Guide (copy) . United Kingdom: HODDER EDUCATION.

MLA Style

DAVIS, Andrew., NAGLE, Garrett. "Environmental Systems and Societies for the IB Diploma Study and Revision Guide (copy)". United Kingdom: HODDER EDUCATION, 2017. Text.