Nautiyal. Shivanand. (2012). Paryavaran: Samasya aur samadhan. Samayik prakashan.
シカゴスタイル引用形Nautiyal. Shivanand. Paryavaran: Samasya Aur Samadhan. New Delhi: Samayik prakashan, 2012.
MLA引用形式Nautiyal. Shivanand. 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.