Sheel S.K. (2015). Textbook of Basic Mathematics: For Forestry, Horticulture and Agriculture Courses. Daya Publishing House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSheel S.K. Textbook of Basic Mathematics: For Forestry, Horticulture and Agriculture Courses. New Delhi: Daya Publishing House, 2015.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSheel S.K. Textbook of Basic Mathematics: For Forestry, Horticulture and Agriculture Courses. Daya Publishing House, 2015.
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