Saxena, y. (2004). Environment explained: Meaning and definitions of terms and themes. Excel.
芝加哥风格引文Saxena, y. Environment Explained: Meaning and Definitions of Terms and Themes. New Delhi: Excel, 2004.
MLA引文Saxena, y. Environment Explained: Meaning and Definitions of Terms and Themes. Excel, 2004.
警告：这些引文格式不一定是100％准确.