Tyagi, A. (2007). UGC NET/SLET: Environmental science. Danika Publishing company.
シカゴスタイル引用形Tyagi, Anil. UGC NET/SLET: Environmental Science. New Delhi: Danika Publishing company, 2007.
MLA引用形式Tyagi, Anil. UGC NET/SLET: Environmental Science. Danika Publishing company, 2007.
警告: この引用は必ずしも正確ではありません.