Dyfyniad APA

Rueff, G. A., & Catlin, G. L. (1884). Cattle breeds of the world. Judd & Detweiler, printers.

Dyfyniad Arddull Chicago

Rueff, Gottlob Adolf, and George L. Catlin. Cattle Breeds of the World. Washington, D.C.: Judd & Detweiler, printers, 1884.

Dyfyniad MLA

Rueff, Gottlob Adolf, and George L. Catlin. Cattle Breeds of the World. Judd & Detweiler, printers, 1884.

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