Dyfyniad APA

International Society of Arboriculture. (2003). Introduction to arboriculture: Tree biology. Champaign: International Society of Arboriculture.

Dyfyniad Arddull Chicago

International Society of Arboriculture. Introduction to Arboriculture: Tree Biology. Champaign: International Society of Arboriculture, 2003.

Dyfyniad MLA

International Society of Arboriculture. Introduction to Arboriculture: Tree Biology. Champaign: International Society of Arboriculture, 2003.

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