Saxena, y. (2004). Environment explained: Meaning and definitions of terms and themes. Excel.
Lua i Stíl Chicago (17ú heag.)Saxena, y. Environment Explained: Meaning and Definitions of Terms and Themes. New Delhi: Excel, 2004.
Lua MLA (9ú heag.)Saxena, y. Environment Explained: Meaning and Definitions of Terms and Themes. Excel, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.