SINGH, S. (2007). Farm machinery: Principles and applications. Directorate of Information and Publications on Agriculture, Indian Council of Agricultural Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)SINGH, Surendra. Farm Machinery: Principles and Applications. Directorate of Information and Publications on Agriculture, Indian Council of Agricultural Research, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)SINGH, Surendra. Farm Machinery: Principles and Applications. Directorate of Information and Publications on Agriculture, Indian Council of Agricultural Research, 2007.
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