Dyfyniad APA

M J Kropff. (1990). Introduction to crop ecology. Wageningen: Department of Theoretical Production Ecology.

Dyfyniad Arddull Chicago

M J Kropff. Introduction to Crop Ecology. Wageningen: Department of Theoretical Production Ecology, 1990.

Dyfyniad MLA

M J Kropff. Introduction to Crop Ecology. Wageningen: Department of Theoretical Production Ecology, 1990.

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