APA引用形式

Radha,S, & Sankhyan,Amar Singh. (2004). Environmental challenges of the 21st century. Deep & Deep.

シカゴスタイル引用形

Radha,S, , Sankhyan,Amar Singh. Environmental Challenges of the 21st Century. New Delhi: Deep & Deep, 2004.

MLA引用形式

Radha,S, , Sankhyan,Amar Singh. Environmental Challenges of the 21st Century. Deep & Deep, 2004.

警告: この引用は必ずしも正確ではありません.