Dyfyniad APA

Cramer Gail C. (2001). Agricultural Economics (8th.). John Wiley & Sons Inc.

Dyfyniad Arddull Chicago

Cramer Gail C. Agricultural Economics. 8th. New York: John Wiley & Sons Inc, 2001.

Dyfyniad MLA

Cramer Gail C. Agricultural Economics. 8th. John Wiley & Sons Inc, 2001.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.