Brinkmann, R. Introduction to sustainability (Second edition.).
Lua i Stíl Chicago (17ú heag.)Brinkmann, Robert. Introduction to Sustainability. Second edition.
Lua MLA (9ú heag.)Brinkmann, Robert. Introduction to Sustainability. Second edition.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.