Dyfyniad APA

ebrary, Inc, & Lockeretz, W. (2007). Organic farming: An international history. CABI.

Dyfyniad Arddull Chicago

ebrary, Inc, and William Lockeretz. Organic Farming: An International History. Cambridge, MA: CABI, 2007.

Dyfyniad MLA

ebrary, Inc, and William Lockeretz. Organic Farming: An International History. CABI, 2007.

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