Cramer Gail C. (2001). Agricultural Economics (8th.). John Wiley & Sons Inc.
Chicago Style (17. basım) AtıfCramer Gail C. Agricultural Economics. 8th. New York: John Wiley & Sons Inc, 2001.
MLA (9th ed.) AtıfCramer Gail C. Agricultural Economics. 8th. John Wiley & Sons Inc, 2001.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..