Dyfyniad APA

(1991). Progress in agricultural physics and engineering. Wallingford, UK: CAB International.

Dyfyniad Arddull Chicago

Progress in Agricultural Physics and Engineering. Wallingford, UK: CAB International, 1991.

Dyfyniad MLA

Progress in Agricultural Physics and Engineering. Wallingford, UK: CAB International, 1991.

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