Saxena, y. (2004). Environment explained: Meaning and definitions of terms and themes. Excel.
Citazione stile Chigago Style (17a edizione)Saxena, y. Environment Explained: Meaning and Definitions of Terms and Themes. New Delhi: Excel, 2004.
Citatione MLA (9a ed.)Saxena, y. Environment Explained: Meaning and Definitions of Terms and Themes. Excel, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.