Briggs, D. J., & Courtney, F. M. (1985). Agriculture and environment: The physical geography of temperate agricultural systems. Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBriggs, David J., और Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. London ; New York: Longman, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBriggs, David J., और Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. Longman, 1985.
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