Não informado. (1963). Agricultural Science Review. Cooperative State Experiment Station Service, Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Agricultural Science Review. Washington: Cooperative State Experiment Station Service, Department of Agriculture, 1963.
MLA-referens (8:e uppl.)Não informado. Agricultural Science Review. Cooperative State Experiment Station Service, Department of Agriculture, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.