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.
Cita Chicago (17th ed.)Costello, David F., i 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.
Cita MLA (9th ed.)Costello, David F., i 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.
Atenció: Aquestes cites poden no estar 100% correctes.