Shepherd, G. S., & Futrell, G. A. (1969). Marketing farm products; economic analysis (5th ed.). Iowa State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShepherd, Geoffrey Seddon, और Gene A. Futrell. Marketing Farm Products; Economic Analysis. 5th ed. Ames: Iowa State University Press, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्रShepherd, Geoffrey Seddon, और Gene A. Futrell. Marketing Farm Products; Economic Analysis. 5th ed. Iowa State University Press, 1969.
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