Shivanand Nautiyal. (2012). Paryavaran: Samasya aur samadhan. Samayik Prakashan.
シカゴスタイル引用形Shivanand Nautiyal. Paryavaran: Samasya Aur Samadhan. New Delhi: Samayik Prakashan, 2012.
MLA引用形式Shivanand Nautiyal. Paryavaran: Samasya Aur Samadhan. Samayik Prakashan, 2012.
警告: この引用は必ずしも正確ではありません.