Robertson, C. (1971). An introduction to agriculture productive economics and farm management. Tata McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRobertson, C.A. An Introduction to Agriculture Productive Economics and Farm Management. Tata McGraw-Hill, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRobertson, C.A. An Introduction to Agriculture Productive Economics and Farm Management. Tata McGraw-Hill, 1971.
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