Heady, E. O., & Jensen, H. R. (1954). Farm management economics. New Jersey: Prentice-Hall.
Dyfyniad Arddull ChicagoHeady, Earl O., và Harrald R. Jensen. Farm Management Economics. New Jersey: Prentice-Hall, 1954.
Dyfyniad MLAHeady, Earl O., và Harrald R. Jensen. Farm Management Economics. New Jersey: Prentice-Hall, 1954.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.