Briggs, D. J., & Courtney, F. M. (1989). Agriculture and environment: The physical geography of temperate agricultural systems. Longman Scientific & Technical.
Chicago Style (17. basım) AtıfBriggs, David J., ve Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. Harlow, England: Longman Scientific & Technical, 1989.
MLA (9th ed.) AtıfBriggs, David J., ve Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. Longman Scientific & Technical, 1989.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..