Albert Howard. (1956). An agricultural testament. The Other India Press.
Dyfyniad Arddull ChicagoAlbert Howard. An Agricultural Testament. Goa: The Other India Press, 1956.
Dyfyniad MLAAlbert Howard. An Agricultural Testament. The Other India Press, 1956.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.