Dyfyniad APA

FAO. (1989). FAO animal production and health series; 1989: Animal health yearbook. Rome: FAO.

Dyfyniad Arddull Chicago

FAO. FAO Animal Production and Health Series; 1989: Animal Health Yearbook. Rome: FAO, 1989.

Dyfyniad MLA

FAO. FAO Animal Production and Health Series; 1989: Animal Health Yearbook. Rome: FAO, 1989.

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