Não informado. (2000). Technical communication. Imperial Bureau of Horticulture and Plantation Crops.
Chicago-referens (17:e uppl.)Não informado. Technical Communication. East Malling, Inglaterra: Imperial Bureau of Horticulture and Plantation Crops, 2000.
MLA-referens (8:e uppl.)Não informado. Technical Communication. Imperial Bureau of Horticulture and Plantation Crops, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.