Cramer Gail C. (2001). Agricultural Economics (8th.). John Wiley & Sons Inc.
Chicagoスタイル(17版)引用形式Cramer Gail C. Agricultural Economics. 8th. New York: John Wiley & Sons Inc, 2001.
MLA(9版)引用形式Cramer Gail C. Agricultural Economics. 8th. John Wiley & Sons Inc, 2001.
警告: この引用は必ずしも正確ではありません.