APA-referens (7:e uppl.)
Nelson, W. (2007). On the clean road again: Biodiesel and the future of the family farm. Fulcrum Pub..
Chicago-referens (17:e uppl.)
Nelson, Willie. On the Clean Road Again: Biodiesel and the Future of the Family Farm. Golden, Colo.: Fulcrum Pub., 2007.
MLA-referens (9:e uppl.)
Nelson, Willie. On the Clean Road Again: Biodiesel and the Future of the Family Farm. Fulcrum Pub., 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.