Kemp, D. D. (1998) The environment dictionary. London: Routledge. Available at: http://web.b.ebscohost.com/ehost/detail/detail?vid=0&sid=06cc86ec-2cca-499f-ad2f-9edffd79a616%40pdc-v-sessmgr06&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#AN=60565&db=nlebk (Accessed: 24 June 2020).
Section G1.8 in CTR Harvard 12th edition.
Philander, S. G. (2012) Encyclopedia of global warming and climate change, 2nd edn. Thousand Oaks, Calif: SAGE Publications. Available at: http://web.a.ebscohost.com/ehost/detail/detail?vid=0&sid=c896dbaa-88e5-48e1-9c0b-909e885d4054%40sessionmgr4006&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#AN=525909&db=nlebk (Accessed: 25 June 2020).
Section G1.8 in CTR Harvard 12th edition.