Jill Rutherford. (2016). Environmental Systems and Societies: For the Ib Diploma (Oxford Ib Skills and Practice) (Csm.). "Oxford University Press, USA".
Lua i Stíl Chicago (17ú heag.)Jill Rutherford. Environmental Systems and Societies: For the Ib Diploma (Oxford Ib Skills and Practice). Csm. "Oxford University Press, USA", 2016.
Lua MLA (9ú heag.)Jill Rutherford. Environmental Systems and Societies: For the Ib Diploma (Oxford Ib Skills and Practice). Csm. "Oxford University Press, USA", 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.