Não informado. (1936). Bulletin of the California Department of Agriculture. California Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the California Department of Agriculture. Sacramento, Calif: California Department of Agriculture, 1936.
MLA-referens (8:e uppl.)Não informado. Bulletin of the California Department of Agriculture. California Department of Agriculture, 1936.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.