Costello, D. F., & Kipple, G. (1960). Vegetation cattle responses to different intesities of grazing on short-grass range on central great plains. United States Department of Agriculture.
Chicago-referens (17:e uppl.)Costello, David F., och G.E Kipple. Vegetation Cattle Responses to Different Intesities of Grazing on Short-grass Range on Central Great Plains. Washington, D.C.: United States Department of Agriculture, 1960.
MLA-referens (9:e uppl.)Costello, David F., och G.E Kipple. Vegetation Cattle Responses to Different Intesities of Grazing on Short-grass Range on Central Great Plains. United States Department of Agriculture, 1960.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.